Not sure if this is the right place to ask; help figuring out who "I" am?

So, I noticed a couple people in comments mentioning being fictives so I'm assuming systems are allowed here. I am like, 95% sure we have a TADC fictive. The problem is, I don't know who. I know who it isn't; it's not ragatha, gangle, and any NPCs (excluding Caine and Bubble, they're still possibilities). But that still leaves a majority of the main cast 🥲 how do y'all figure this stuff out? Kins, fictives, anyone with any advice, it's valued.