The Jazz Hands on the Blaseball Discord recently had a lorejam about Wyatt Mason II and have come up with a consensus interpretation to create a future lore update based off of.

A summary of that interpretation is as follows:

Wyatt Mason II is also known as "Di", "2W2M", and "Wiiatt"
Echo/Mirror pronouns (Uses the same pronouns as the viewer)
Mason II can play a double-neck electric guitar and lies about knowing more instruments than that.
Mason II is ~16-17
Mason II races fast cars recklessly and in the streets with no regard for their own safety
Mason II had a sports car, which remains at The Pocket and is taken care of by the Jazz Hands in their absence
Mason II is from the Gamma 4 Jazz Hands, who reside in a universe where The Pocket is a speedway rather than a theatre
Due to both being and not being that Wyatt Mason, Mason II had an interesting but friendly relationship with Wyatt Pothos, who was both an original teammate of that Wyatt Mason and one of the original Wyatt Masoning Wyatts.
If they had lived longer before echoing, Mason II likely would have been friends with more people, including Tamara Crankit and Wyatt Mason V
They liked to Echo aspects of non-players in their free time, such as the Pit Cats that hang around The Pocket.
Likes splorts games like Wii Splorts

Topic on Talk:Wyatt Mason II