nico on Nostr: Which “emoji” best represents Nostr so I can add to my profile here and in other ...

Which “emoji” best represents Nostr so I can add to my profile here and in other social networks?
For instance I have now the following

₿ (Bitcoin) ⚡️(Lightning) 丰 (Sats)🧉(Mate that is our national tea) 🇦🇷(Argentina)


What should I add there that most people here would agree it means Nostr ?