GEN Z!

Saiki K, 7DS, and BNHA crossover.

Kusuos sibling Goes by Ash or Alex But there hero name is GenZ.
Gen Z is not technically related to Kusuo.
Kusuos parents were the surrogate for Gen Z's real parents.
Gen Z uses gender fluid Pronouns depending on what gender they feel like that day.
Their real parents are Elizabeth and Meliodas.
Nobody knows except Gen Z and Kusuo.
Gen Z has a quirk from being born at the same time as Izuku. Instead of him getting a quirk they got it. Their quirk is Emotional Control. She also has the psychic abilities that Kusuo has. That is not either of their quirk tho. No one knows about this except each other. Kusuo had to choose a quirk so he chose his pyrokenesis ability to be his quirk.

Gen Z can visit the Seven deadly Sins through her pet. Because she is half demon and half angel she has a pet demon named Lucy. It just looks like a regular dog but it can open a portal to the demon realm for them to pass through to open another portal to get to Britannia.

Sorry for my shit spelling