Me too!
According to summaries that were made long ago, in Volume 2 of Ace's Novel there is more information about Tatch, because he has a lot of participation there. He's one of the first to get close to Ace and has probably been one of his closest friends.Tatch was sociable and a nice guy.
Often he appears in fanarts/fanfics with Ace and Marco, where the 3 are drawn in quite a few comic situations. Often I think that the drawings are followed by they three more Jozu, Vista, Haruta and Izou, and occasionally with Withey Bay.