Ah, well, I’ve actually ran play by posts for several D&D 5e podcasting groups.
We pretty much all just referenced each other by our avatars, mine being a picture of some wooden dice, a pipe, and a glass of tea. So, my PbP name for roleplaying since then has been teaanddice.
on a side note, I spelt it like that because the doubling of letters was aesthetically nice: teAAnDDice