XFOVH (mainly four,x,two and Infinity) headcanon backstory (goes into canon later on)
Two and four are siblings (headcanon of mine) got along really well (two takes care of four considering they are younger ALSO A HEADCANON) Infinity comes in when twos around the age of 7 (four would be 5) and it gets all messed up since that. Fours jealous of Infinity and twos bond and four knows Infinity has smth against them so they favorite two and teach her things (reason why she's so powerful compared to the rest of the algebralians because a goddess (Infinity) took care of her and taught her). Four takes their anger out on two knowing Infinity is bigger and stronger and twos vulnerable (four does things to two HORRIBLE THINGS but she still loves them) they get older and x gets brought into the story. Four and x get along and than four brings x over and cuz two is such a friendly person they also get along which angers four because they have a mindset that two steals everything good from them and I have to hate her for it. Fours neglected in attention while two isn't, four develops BPD (SO FUCKING CANON TWO THE SHOW FOUR PLEASSEEE BELIEVE ME 😭😭) they age and whatever uhh on fours 15th birthday two does smth special for four (bakes a cake and all that) but four is hiding in their room so two waits but she gets sad and ends up going to Xs place for some support (Some ship 2x stuff happens because I NEEDED TO ADD THAT!!) two comes back and four asks where they were and they have a argument because fours jealousy problems and two says without thinking she hates four and she hopes they die in a hole. Four stomps into their room and slams the door and twos left there and she just starts crying than she goes to her room and than I might rewrite this part because I put alot of self problems into it blah blahh. Next day two reads a note four wrote of them saying not to contact them anymore and two gets insanely depressed and lonely but atleast she has Infinity right? (Infinity disappears on twos 18th birthday and two is left alone in their home) two stops going out. Years later Four starts a show called bfb (starting to get into canon) two sees this and watches it and she gets inspired to do the same thing maybe it would help four and two bond considering they haven't spoken in years goes into canon and yeaaa. Four and two still don't get along Four hates two but two would always be a big sister for four if they ever needed it even after all this shit happend Two and gaty do talk in the show and gaty mentions smth along the lines of being away from four has helped two. Twos iffy but agrees in a way (implied ig)
(You'll see in this)
Two pushes four to get along with them again (I'll repost this with another video of it showing that)