A gamer who likes pastel aesthetics usually has a pastel setup and surrounds themselves with the pastel theme. Their theme could be all the pastel colors or just a specific color or two but it is usually just very light colors. They are usually into soft cute things but can be found playing any game.
There are a lot of cute pastel gamers nowadays.
My friend is a pastel gamer. She has a lot of plushies and plays animal crossing.