It's been suggested before, and I think it would be appropriate for the moment of social distancing we are experiencing. This new emote consists of the player hugging another player, as long as they are available.
I don't know how animations are developed, but if it may help, during The Mighty Fall quest, the player hugs Zanik. For reference: https://runescape.wiki/images/archive/d/d9/20190320192718%21Zanik_hugs_you.png?64d5c.
12-Sep-2021 17:26:58