Hey those are various beetleball players (which is a game im a developer for). None of them have fediverse accounts since the game isnt part of the fediverse usually but you can join the discord to see activity relating to it (and each of the people you said there has a discord accoutn with a lot of history you can check) https://discord.com/invite/beetleball

thought it would be fun to do a design relating to the game so I announced it in the discord and some players signed up and have been constructing it. That design specifically is one of the icons for one of the beetles