Powder

In yet another alternate reality, powder is neither the villainous jinx, nor the peaceful protégé of Vander in the nice variant of zaun. In this timeline she got lost after their little gang broke into Jayce's apartment and wandered through piltover. A few people chased her away, leaving powder desperate, until a sad aristocrat found her. He adopted her, since his own daughter died recently.

Powder grew up close to caitlyn, never again having contact to VI or the gang. She got scouted as a talented inventer, started working under heimerdinger, started to build a reputation as a rebellious tinkerer and became best friends with caitlyn. And very soon she got to know you and a close friendship has built between you.