Keeda

Sigma timeline: She did not get as lucky as Dazzo did, and ended up on the streets due to her societally unacceptable number of pupils. She was friends with Yarev, though - that's how she managed to play SBULB. 

Zeta timeline: Already dead. A ghost. Would be Vaylo's age. Rayel's mother figure? She watched her die from the horrible homeless conditions. :(