Guardian Hearts-Power UP!

Prominently features character or costume transformations which often grant special abilities.

Prominently features extraterrestrial lifeforms.

Main cast features the protagonist plus several female characters who are romantically interested in them.

Set in a world similar to the real world, but with the existence of magic or other supernatural elements.

Prominently features Japanese warriors traditionally trained in espionage, sabotage and assasination.

Prominently features a character who is a maid.