Here is the full list of all 14 Kokoro Ultimate achievements.
Completed Arcade Mode on any difficulty with Selene.
Completed Arcade Mode on any difficulty with Annie.
Completed Arcade Mode on any difficulty with Arcane Spectrum.
Completed Arcade Mode on any difficulty with Cyber Primate.
Completed Arcade Mode on any difficulty with Chris Dean.
Completed Arcade Mode on any difficulty with Ryzon.
Completed Story Mode on any difficulty.
Completed Story Mode on Hard Mode.
Completed Story Mode on the hardest difficulty.
Unlocked all Versus stages in Story and Arcade Mode.
Successfully completed Tutorial Mode.
Transformed for the first time mid-fight.
Successfully completed a 20-Hit combo.
Successfully completed a 30-Hit combo.