The Tavern

Killed Boris on Depths:3 and just found again on Vaults:5.

Is this normal? Is Boris kind of like the cat and comes back?

Yeah, Boris can come back again and again. Back in the day when we had more levels in the Dungeon, Vaults etc. it was not uncommon (for me at least) to kill Boris three times. Nowadays he seems to come back a lot less often (I have no idea if the actual chance of coming back has changed). Boris is eligible to appear on Depths:3-5, Vaults:2-5, Crypt and Tomb and whenever you enter a new level there is a chance that he will be generated again.

If you leave him alive on a level, he won't reappear elsewhere, of course.

I'm pretty sure it hasn't, but there are fewer eligible levels now, so effectively he shows up less often.

I haven't seen Boris in 200 games.

FR: Change this.

Why doesn't Boris reappear in hell/pan, anyhow?

It would be annoying if there were no way to get Boris to stop bothering you if he spawned in your game.

Make it so that if you leave him paralyzed on a level, he can't follow you!

Same reason Sojobo and The Enchantress and vault sentinels don't spawn in hell/pan.