Kinka byo vs effect veiller

So what happens to Kinka? Stays on the field or return to hand?

Kinka stays to suffer in our materialized world.
No,Kinka will not return to hand.Just like any other Spirit monster.

Veiler owner (the non-turn player) decides whether the Spirit monster returns to the hand or not by stopping to apply his Veiler before or after the Spirit monster's owner is forced to attempt to return it to his hand.

That's due to priority.