Sage may have thought Quinn was her true friend, but Tremolo shows her what true friendship means. Sage and Quinn, it is written, have actually kept many things dead. Tremolo, on the other hand, actively and selflessly helps Sage. So what is true friendship?
Sage has had to correct Quinn's mistakes, it is written, a few times. Pretty one-sided friendship.
Tremolo was really only there for Sage and never asked for anything in return. Sage knows Tremolo and Maya are close, though. Tremolo not only scratched Sage's back, but actually scrubbed it bloody. Sage will help Maya because Maya means a lot to Tremolo and so she can scratch Tremolo's back for once.