Um... yeah, everyone was d3ad in that one, so Rosa failed her mission, she feels useless(because her main objective was to protect Jonah and Mark, and she also had a secret crush on Adam, not a huge crush, but enough to where she cared about him), and ends up not being able to defeat Gabriel(who is her own main threat, she's stronger than Cesar, but not stronger than Gabriel).
For Scratchiechan! Canons in my version of the AU: 1. Rosa is taller than Cesar (that's why she calls him "Shortcake", in a nice way!) 2. Rosa views Mark as a brother and treats him like one. 3. Rosa secretly has a crush on Adam 4. Rosa and Jonah share the same one brain cell (they have some of the same habits) 5. Rosa knows what is real and what is a trick.