BNHA Alternate Timeline: Symbiote and Friends

!WARNING!
There will be swearing and gruesome scenes. You have been warned.
Follows the the general BNHA timeline with a few changes.
Change 1: Bokugo never was a bully to Izuku. Infact, he remained his best friend and is very protective of him (like an older brother, not any of that gay shit). This also isolates him from the rest of the Junior High class.
Change 2: Izuku gets Toxin.
Change 3: Izuku has a twin sister who has a quirk(Fire Spirit from both parents); Bokugo likes her. She also goes to UA.
Change 4: Bokugo has almost a split personality. When he is in public(anywhere that is not his home, a friend's home, or the classroom), he acts like he does in the anime, but when in private(his home, friend's home, classroom) he acts like the funny and cool older brother.
Change 5: The planet's name is not Earth. For this story I am calling it Chikyū(Japanese for earth)
Disclaimer: I do not own marvel, my hero academia/boku no hero academia, or any pictures used.