new champion : prince in deep sea

What exactly is this "mindless unit"? And also can enemy change E direction while an ally is walking on it? Is the "companion" any ally champion or only one chosen(like with Kalista)? Also it seems he cannot control his passive proc(the projectile attraction). Overall he is a support with lots of utility and 0 damage. I personally dislike his E idea, it would be OP for some allies and useless for others

someone was hella bored i can see.