How do I change my manipper tag, and optionally my username? I'm trying to sanitize my google search results for my username. Thanks.

I don't know about the manniper tag, but I think you can request a mod about that.

About the nickname is a different topic, since there was some cases where users faked their identities in order to mess up other user's accounts, nickname change feature are disabled.

Alright. I'll see about changing my tag with a mod. Thanks!