In that case, if Ais is left alone, she will surely die, or if not, the strange ones will succeed and take her away.
In short...
"Reiger stays, his survival rate is definitely much higher than yours, after all, he has a lot of Magic, and in the face of danger, he might be more likely to survive than any of us."
"He has also proven his strength, even [the Mighty] couldn't do anything to him in a short time without using Magic or activating skills. By having him stay behind, the chances of defeating the enemies are also higher."
"Moreover, if the enemy's target is you, then by not being present, you can disrupt their plans and give Reiger a sufficient opportunity to turn the tables."
"In summary, you cannot stay."
Finn's excessively sharp and realistic remarks left Ais without a word to refute.
The girl could only grip the hilt of the Sword of Despair tightly, her fingers turning white from exertion.