A few cleavage shots of Kikko when showing Ullr in the first episode.

Episode 4 of season 2 shows full on nudity of Devila, with nipples. There's no sexual implications, but it shows up throughout the episode.

One last naked shot of Devila in the season 2 finale with nipples. It's very brief and isn't on screen for very long, but it's quite noticeable.

Most of the action in the show is bloodless. The action comes down to the superpowers being used with buildings and environments being destroyed.

Emi burns her hands trying to control Jiro's kaiju powers.

Not much. A few minor uses of 'damn' and 'hell' depending on the subtitles.

Some occasional drinking or smoking, but it's very casual and nothing too questionable. Such as Jiro just drinking at the bar where the superhuman band are performing, or Raito casually smoking.