Flirting: Mel is in a mono relationship. It is some flavour of aromantic and asexual. Hands and other appendages off lest they be cut off.

Affection: hugs fine, although i might not always want them. It's fine as long as it's not after Mel said no. See above for the rest.

Being sexual at Mel: no

Interacting is generally okay unless Mel specifies it isn't.

Offenders will be teleported to perpetual christian summer camp (or maybe blocked who knows)