(FYI I'm speeding through his childhood, cause nothing much happens. Apart from some funny moments, and Laharl testing his abilities)
REBIRTH
Location the Underworld, Bael Territory: Belladonna's Mansion, Outside of the Infirmary
In a gothic, lavish mansion multiple maids, and butlers with several distinct physical traits, from animal ears, eyes, and even completely different skin tones and haircolors, were scrambling around. Because their mistress has gone into labor, in their society a pregnancy and birth were considered sacred, cause their race, known as devil from the biblical faction, have unfortunately low birth rate. Hence, when a devil woman, especially from one of the 72 clans of the Underworld, drives instant reaction and action from all servents and family members. As their mistress was the younger sister of Lord Bael, and Lady Gremory, and after many attempts, she finally got pregnant from her recently late-husband, a powerful devil name Krichevskoy.
Just this morning, during breakfast Lady Bael's water broke and she was rushed to the mansion's infirmary. And for the next couple hours, the head maid and nurses were the only ones permitted into the infirmary, and help their lady give birth to the young heir or heiress of house Bael.
While still scrambling and waiting for any word of their lady and her baby's state, a young horned, pink-haired devil maid, came rushing in, getting the attention of all the other servents. As she panted and tried to catch her breathe, she managed to say, "Everyone!! Lord and Lady Gremory, along with Lord Lucifer are here, right now!!" Just as she finished saying that, her fellow maids and butlers, rushed off to greet the honored guests.
Location the Belladonna Mansion Entrance
A couple was standing next to each other, with arms interlocked. A handsome man with vibrant red hair, and a slight beard, was standing next to his pregnant wife, a light brown spiky haired woman in a blue dress, with a clear pregnant round belly, taking the shape of her dress, these are Zeoticus and Venelana Gremory. Standing near them was their elder son, a younger, longer red-haired devil, considered the strongest or one of the strongest devils in their society. Apart of the Four Satans, the current Lucifer, Sirzechs Lucifer. These three came immediately after their family member, Belladonna Bael, called them to tell them that she was in labor. Hence they came to be by her side, and hopefully welcome a new member not only to their family, but also to their society. When they telephoned to Belladonna's home, they were "greeted" by a pink-haired maid that was running with some towels, but when she saw them, she'd gasped and dropped those towels...which are still on the floor of this grand entrance way.
It didn't take long for more servents came to greet them, of all their family members, Belladonna had the most servents. Offering home and employment to many in need, earning her their adoration and loyalty, which explained the unsteady and nervous bunch of devils in front of them. Venelana, just placed her hand over her mouth, and giggle, as she calmed down the servents of Belladonna, and requested of them to take them to Belladonna. The black haired, glasses wearing, butler, heard Lady Gremory, and nodded. As he cleared his throat, making his demand clear, as all his fellow servents made two line at the edges of the main long red carpet, that travels all through the front door all the way to the golden and marble stairways beside them.
These servents bowed in respect to their honor guests, and welcomed them to the mansion, as the glasses wearing butler, presented his arm through the path, saying, "Lord and Lady Gremory, Lord Lucifer. Please, follow me." Zeoticus, Sirzechs, and Venelana, nodded and started following the butler in there way to be with Belladonna.
Meanwhile...
Location Belladonna's Mansion, Inside of the Infirmary
A beautiful woman with vibrant red hair, in a twirly and curly hair tied in a elegant bun, with bright blue eyes, laying on medical bed and covered in white sheets, as her face was beaming with both happiness and pride. She is Belladonna Bael, the third child of the main Bael Clan, sister of Venelana, and Lord Bael. As she was being attend by the head maid, and nurses, all walking around the infirmary. After some hours of labors, she managed to deliver a healthy, baby boy.
Just as the nurse was about to give her baby, the main doors of the infirmary were open. Coming into the room were her sister Venelana, accompanied by her brother-in-law, Zeoticus, and her nephew, Sirzechs. Venelana, even pregnant, she was able to run over to the side of her bed, and check on Belladonna, her sister. After Belladonna, reassured her dear sister that she was fine, they were joined by Zeoticus and Sirzechs.
They asked how the baby was doing, and at that moment the nurse gave Belladonna her son. Wrapped in a white bundle, as they saw the baby face of a red and blue haired boy. Showing traits from his mother...and his father, he even have his antennas, at that moment, tears began to fall from the side of Belladonna's face. Venelana, knew why her sister was crying and comfort her, both Zeoticus and Sirzechs stayed silent since they too knew the reason why Belladonna was soo emotional. Belladonna, thanked her sister for her support, as her son steered in her grasp, as her nephew asked, "Aunt Belladonna. What is his name?" Belladonna, stayed silent for a moment, before answering, "Laharl. His name is Laharl Krichevskoy Bael."
Hearing his name, Sirzechs smiled, as he reached out his finger to caress his baby cousin with affection, just as he was about to touch Laharl, he said, "Hey little Laharl-kun. I'm your big brother, Sir..." when his finger got closer to Laharl face...
AGE 0
Location Belladonna's Mansion, Inside of the Infirmary: In his Mother's Grasp
Laharl, was reborn not just a couple moments ago, for anyone who would know the storyline of Highschool DXD, would be scratching their heads, asking themselves, "Who the hell are Belladonna or Laharl?" well to answer that question, they're non-canon characters. Or better said their aren't canon in the original Highschool DXD world, but in this version of that world, the main character, Laharl is a reincarnated. You see, during a robbery while buying groceries in the supermarket, he was shot and died. Then he was sent to the afterlife, were he meet Death, yes, big D.E.A.T.H, resembling the classic skeletal reaper visage.
Death was welcoming all the arrival to his realm, to be processed and judged for either Heaven or Hell. When it was his turn to meet with Death, he was told "Congratulations." caused he was the lucky, 99999999th soul to processed in this millennium. Which meant he was given the special option of not only being reincarnated to the world of his choosing, but thank to all his accumulated karma he gained five wishes with some limits. Such as he can't become omni-powerful, destroy the plot of a worth entirely from the start, and a few more exceptions. But Laharl already had his wishes in his mind, and ready to be granted.
One of those wishes was to be reborn as his favorite video game character, with access to all his powers, skills, knowledge, and experiences from the start. Thus he was born as Laharl Krichevskoy, but he didn't expected to be born also as part of the Bael family...which meant that... As he was thinking of things that happened, he heard Sirzechs speak to him, "Hey little Laharl-kun. I'm your big brother, Sir..." once he got close enough to Laharl, he channeled his demonic magic, to burn Sirzechs' finger with his hellfire magic. Sirzechs, hissed in pain, as he pulled back his hand, as said hand was engulfed in hellfire.
This shocked all the adults present. Not only cause of what happened, but who did it. A newborn, barely minutes old, was not only able to harness his magic but also hurt Sirzechs, Lord Lucifer, a Super Devil that has always been keeping a thin layer of Power of Destruction on his body. To act as a barrier, and a baby was able to basically break through this layer of destruction, and hurt Sirzechs. Sirzechs, after he calmed himself, he used his own Power of Destruction, to destroy the hellish flames off his hand. As the nurses present rush to treat him, he didn't show any bad or annoyed feelings towards his baby cousin. Instead he was impressed, as he said, "He is surely "his" son. Good job Laharl-kun, I know you didn't mean to hurt your big brother. But regardless, you showed great potential baby cousin." saying all of this with a big smile on his face.
After everyone calmed down, Zeoticus started to laugh, saying thing that their house is more then secure. With Laharl and his new child, it will prosper to new heights. Making Venelana shake her head, as she could never fully understand what her husband or son think, meanwhile Belladonna just laughed, loving spending such a special occasion with loved one. While Laharl, out of everyone's sight, shuke his head, nit believing how lame Sirzechs, he was one of least like characters of Sirzechs, he still thinks that should have been him to die, instead of Levia-Chan!! But regardless with him finally reborn, he could soon start his new life and journey in the DXD world, which made him smile, and laugh...babily.
Location Infirmary Nursery, Inside a Baby Crib
It took an a hour for Sirzechs to leave for work...but not before promising he'll come to visit him, and his mom again. He can't stand that sis-con beta, whatever, after he left and he was spoiled by his new mom and aunt for a while, while Zeoticus boasted on what he'll do for the Bael house, Laharl, was breast feed...kinda awkward when one has a mature mind on a baby body. He was left to nap on a crib in the infirmary, while the women talked about decorating his future room. Which meant that he'll have better privacy in the future.
While he pretended to sleep, he was checking on two other wishes that he made. One was a special system called "Demon Summoning" after a certain amount of time he could summon a demon or monster girl from any world to be his and joining his future peerage. He checked it, as a blue screen appeared having the first period of wait for him, [60M]...five years...ohh how he wanted to yell, but then he thought. During that time he could grow stronger, and capable of handling any of the more higher classed characters he might chose. So he calmed himself, and dismissed the screen.
Now he can check the other wish. Which was a basic dungeon crawler system, that by hunting monsters and others creatures in their he and his future peerage and harem can grow stronger. This system is called the Hunter's Exp, appearing a white arrow pointing at the location for a dungeon, fitting to his current level of power, hence it color being white, which equalled safe.
So disactivating that, that's three wishes down his rebirth as a customized Laharl, his summoning and dungeon systems. The other two could wait until he was older, but regardless all he could do now is wait. As he played with his red right antenna, trying to fall asleep, he had all the time in the world to become even stronger. Cause he swears on God...as he though of the Big G. he felt a stinging pain on his head, and remembered that DXD devils are weak to light and holy, which means the Big G. name as well. Returning to his train of thoughts, he'll will not be involved in Rias bull in the future.
While he'll admit that Rias is beautiful, and he did have a folder of exclusive photos of her on his previous laptop. That was all that she was good for, Fap Material, on...G. Sure she was funny in the anime, but everytime shit got real, she proven to be a liability, everything was solved when she flashed her tits to Issei and boom!!! Another bite the dust. But then she acted like a human highschool girl, instead of a devil, that should be the more free, open minded, and debaucherous race in the whole series...
After ranting a bit, he felt mentally exhausted, and finally sleepy. Getting comfy with his baby body, he drifted off to sleep...
AGE MONTH 1-5 Location the Gremory Territory: Gremory's Mansion, a Random Hallway in the Mansion
It been a few mounts. Apart from being babied by his mother, aunt, uncle, servents...and the annoying Sirzechs, nothing much happened. Apart when he was three months old, he learned to walk like a pro, making his mom gush allover him. Honestly it reminded him of his mom from his previous life, she was loving, attentive, and sweet. So he did started to show some affection towards her, same said by Aunt Venelana, honestly anime didn't do her justice, she was a true beauty and bountified MILF. But incest was never attractive to me, so it was only familiar love...with some deep admiration, Laharl had to admire Uncle Zeoticus, must have had game to catch Venelana. Hence what Laharl mostly had for Zeoticus was respect.
In month five of him being born, it happened Aunt Venelana went into labor, which meant that Rias was about to be born. Laharl was dragged by his long red scraft that appeared around his neck, a month ago. When mom tried to mess with it, and pulled she accidentally hurt him, causing Laharl to transform his scarf into large demon wings, and fly away. After mom called Sirzechs, and he came, with the another Satan, the mastermind behind all the other, Ajuka Beelzebub, his green hair and cold persona making him indistinguishable. He used his analyze magic on Laharl, and confirmed that while it was a scarf it was connect to his actual being and core, so it can be considered to be extra-limbs for him. Since then mom has been careful around his scarf, but also used it as a method of punishment when he did something wrong...like the time he nearly blew part of the mansion, cause he was excited to use one of his power. He used Dark Bolt and blew-up a wall, which scared a lot of the poor maids, and earned him a scolding and time-out from mom...
But back to the main reason he was in house Gremory's home. The little red and blue antennae devil, showed a bored expression as he used his right scarf as a arm to juggle some vases. Much to the horror and dismay to the Gremory servents, worried he'd dropped them. But that day he meet another renowned waifu of the DXD world, as the hallway that he was on suddenly became cold. Turning his head he saw the silver-haired super maid, his cousin-in-law, Grayfia Lucifuge, her iconic white and blue maid outfit ensesuating her figure. In a cold, stern, and calm voice, she ordered Laharl, "Lord Laharl. This isn't how a heir of House Bael, should behave. Your disrupting the work of the servents of this house, please lower those vases." He smirked, as he tossed them high, then as the maid panicked, he stretched his scarf to wrap around each vase and hand them to the confused maid. Laharl spoke to Grayfia in a carefree attitude, "Cousin. You now I wouldn't dropped them. Just testing my extra-limbs, and besides...I was bored." shrugging his arm as he finished talking. Grayfia, sighed and told him to follow her, his mother, uncle, and Lord Lucifer were waiting for him.
Now he sighted, scratching his head, as he stretched his arms and started following his Cousin-in-law. As they walked side by side, Grayfia was glancing at the barely year old. Already he could walk, talk, and use magic like that of a Mid-Class Devil, as impressive as that is, she'd wished that some of his issues be looked into. From his careless attitude, challenging authority, and...his disdain on wearing shirt. No matter what miss Belladonna, or her maid tried to do, he'd would destroy the shirt he was force on, and only wear shorts or pants. Lately he started wearing a studded collar that he said he won from a opponent, sighing, at least she knows that deep down Laharl is a good boy.
Last months he'd help his mother with things, as well with the maids. Even protecting them from a random monster that managed to sneak onto their properties. Which also brought out another quirk that she considers that might be a issue in future, Laharl has shown to be quite a fighter, and enjoys battle...let's hope it doesn't lead to some strange traits further on...