Frequent scenes of female characters (most notably Kei and Yuri) in scant or revealing clothing.

Infrequent scenes of partial or complete nudity (breasts and occasional buttocks shots, nothing graphic), again centered mostly on the female leads.

Sexually-themed banter and dialogue between certain characters here and there.

In one episode, an ancillary female character is unveiled to be a lesbian, coming on to Yuri and displaying signs of affection towards her.

The Lovely Angels are known as the "Dirty Pair" due to their proclivity for causing major collateral damage throughout their missions; indeed, more often than not when cases are closed they end up destroying buildings, vehicles and space craft, resulting in injury to others or, sometimes, themselves.

Numerous fight scenes throughout the series, either hand-to-hand or weapons-based, again resulting in injury.

A few characters die throughout the series' run.

Mild to moderately strong cursing ("shit" is the worst offender).

For what it's worth, the series is very light-hearted in tone, through the occasionally scary/dramatic scenes are still shown.