None.

Right in the opening scene, multiple spaceships get blow up. A machine in space blows up a city, where it is implied that people would have died in it.

A girl has a disturbing vision of massive explosions and a few people killed in it.

Some helicopters chase a boy and a girl, and shoot at them. However, the boy and the girl manage to escape.

There is a brief scene of people rioting.

A few supernatural fighting, which are pretty short.

A girl puts a drug in her mouth.

A drug is dropped in a glass.

This anime feature is likely more suitable to teens and adults due to the small amount of violent content (see Violence & Gore). Especially the supernatural elements and explosions might disturb children.