Peashy in my au (also some stuff about Yellow Heart)
a 5 year old child who recently escaped from an orphanage and was found by Plutia, they have a lot of bad luck and usually cause problems for others around them, they also have nightmares about the orphanage they were in
Eventually Plutia adopts the baby versions of Compa and IF, Peashy feels pressured to take care of them as well but secretly feels jealous because they got adopted way faster than they did
5 years pass and Peashy is a bit more energetic but is still traumatised from what happened in the orphanage, that's when Compa and IF get kidnapped by Rei, Peashy follows the 3 and finds a CPU memory in Rei's purse, they recognize it and decide to swallow it to protect Compa and IF, this however leads to Neptune scolding her harshly when everyone finds out, Peashy has enough of Neptune being lazy and scolding them so they run away where they run into Anonydeath, who offers them a loving home, Peashy accepts and joins the seven sages where they become Yellow Heart
Yellow Heart is very ruthless and can fight very well, making them a threat to the CPUs, this is until the fight in the lab where it's discovered, that Yellow Heart is Peashy, they lash out at Neptune and refuse to leave the seven sages, however after this Yellow Heart starts to compare themselves to their human form, eventually Neptune returns to talk to Yellow Heart and after a fight the 2 talk it out and Peashy returns to living with Plutia and Neptune
Eventually they go to the hyperdimension after the portal is opened and there they meet Ram and the 2 grow close very quickly, Peashy develops a crush on Ram but can't bring themselves to confess, this is until a few months after the final battle where Ram and Peashy confess and start dating
This is probably one of my longest posts yet...