Tahm Kench in TFT

Demon: absolutely since that is one of the things he is called the most. He even calls himself a Demon.

Pirate: Doesn’t make sense he really isn’t one, just hangs around bilgewater. It doesn’t make sense lore wise but would be great gameplay wise because he would be able to fill a role no other champion has. A tanky pirate while also being demon/brawler.

Brawler: Makes sense since he is a tank but also sort of not since he doesn’t fight with his fists or brute force.

One extra thing: Of course his ability would be to eat champions but the issue is taking someone temporarily out of battle might be too strong, it wouldn’t help that he would be a three or higher tier champion. So to help balance wise, I’d say he should only have two roles.

Pirate?

Demon/Brawler at best. He doesn't even have a Pirate skin either.