They're the best resource we've got for this stuff, but this time it falters because it's a sidequest, those aren't particularly well-documented. The best you'll get on this is here, but I'll warn the best we've got is still pretty meager:
https://youtu.be/9b8T3z-UNwM?t=539
Rycharde appears in exactly one quest, in fully obscuring cloak and half-mask. Other than being able to discern his race (he's a hyur, I think maybe a Highlander; the player being a lalafel kinda throws my size estimations), there's nothing else to really go off here.
Although, fun fact: they reuse the Echo flashback cutscene he initiates in 4.1, it's the moment when Raubahn wins enough money to buy the Coliseum!
To answer the OP's other question, though, he did leave, so he was alive last we saw him, but running in a bad crowd that says to me it wouldn't be surprising if he turned up dead later.