Nothing much has changed in her character design from ZERO3 except for the missing hearts in her chest, but the same can't be said about her fighting style as her new set of moves have incorporated elements from the WWE in her arsenal--like Steve Austin's Stone Cold Stunner and Cesaro's Giant Swing and the Frankensteiner.
Rainbow Mika's V-Skill, Mic Performance, has her "cutting a promo" to pump up her fans. The longer she does this, her normal and special moves grow more powerful, and she can absorb one hit from her opponent. She throws the mic at her opponent when she's done.
Mika's V-Trigger adds a big differentiation to her moveset from ZERO3, as performing it mid-fight will make her tag-team partner Yamato Nadeshiko interfere in the fight, assisting her with dropkicks from behind her opponent or elbow drops from above. Nadeshiko also assists Mika in her Critical Art.
Check out Rainbow Mika's reveal trailer below.