Which units in the Dungeon castle do you dislike the most (based on their appearance)?

I agree, but I don't quite agree with the adjective "kind"... If you meant "not evil enough," then I agree 100%.

You could say it that way too; they definitely lack harshness. For example, I probably admired the "Reconciliation" for about 10 minutes. It is really well done! Which can't be said about the demon retinue.