The "violence" is almost entirely slapstick comedy. Dejiko frequently uses her "Eye-Beams" (lasers) to blast people who annoy her, particularly Gema or Usada. Victims are usually charred or left with "cartoon" injuries that disappear in the next scene. There is no gore or realistic blood.
The English dubs and subs are generally very tame. You might hear words like "stupid," "jerk," or "idiot." In the original Japanese, characters use rude pronouns (like kisama) or insulting language, but it rarely crosses into "strong" profanity.