These make nice pets and are considered humanoids for the sake of charming.
I pulled a Giant Dragonfly and it used some sort of spell to pull but later I sent it after one and it ran right up to melee. Not sure what it cast before but so far it has been a decent tank.
Update: They cast DD (15-20 dmg) and will poison on occassion when in melee. Poison was hitting me for upper teens.