In Ji Minghuan's perception, Su Zimai wasn't a heartless or unkind child.
Since her mother's death, her emotions were rarely cared for, so she gradually became somewhat insincere, preferring to put on a cold front in front of family—children whose emotions weren't attended to in childhood often grow up to become indifferent and self-enclosed.
But in truth, she cared a lot about her brother, Gu Qiye.
If she found out that Gu Qiye was actually Blue Arc, she would certainly first sternly scold herself, and might even turn around and become what she had scolded, a "fanatical Blue Arc fan."
In both reality and online, if she saw someone insulting Blue Arc, she would immediately charge over and say, "My brother has to take care of two younger siblings and save the world, I won't let you hate him, if you must hate him, you might as well kill me first, you fool."