It's easy to play the role of a pacifist character in D&D. The trick?
Do not tell anyone that you are a pacifist...seriously, don't write it on your character sheet, don't even speak the word aloud. Because as soon as someone (usually the DM) finds out you are playing a pacifist character, they will crack their knuckles and sneer and growl "Oh
really. Well. We will just see about that."
Just roll up your cleric, cast your buffs and healing every round, and save your attack rolls and blast magic for constructs, plants, and undead. Five bucks says it will be
months before anyone notices.
Me: My character is a pacifist.
Everyone else, apparently:
(Disclaimer: I'm not suggesting folks SHOULD play pacifist characters--only that it's possible to do so. Play the way you want.)