Demonic Heroine in Peril (2005)

Sinopsis

A female assassin is sent out on her ultimate assignment: take out Trionger, a trio of semi-retired super-rangers in power armor (who may or may not have their own line of toys). Unfortunately, she doesn't count on becoming friends with Trionger's unbelievably weird kid sidekick, thereby setting up a confrontation with her own malevolent masters!