Some fanservice elements such as the clothes the Nereids wear though it's very tame and no exposed nudity is shown.

Maia does say at one point a criminal is wanted for rape.

Some Disney level innuendo is used though nothing too explicit

Despite being an Anime aimed for a Seinen Audience, it has mostly mild violence and blood is barely shown.

Yu's face bleeds a little when a bullet hits the side of her face.

Gloria stands in a pile of her dead foes. However no blood is shown.

Swear words in the dub are almost as mild as the Japanese version. The words damn, hell, b..tard, bitch and infrequently s...t is used.