>>120569051It is NOT wrong.
>>120569003Here's what happened:
Claremont and Jim Lee do X-Men. For some reason or other they decide to turn Psylocke into a sexy ninja. Both have claimed it was their idea, and there are various accounts of why it happened, but it seems like it was originally supposed to be a temporary change. In the story it is EXPLICITLY shown to be done by British Betsy being operated on and given magical plastic surgery by the Hand which makes her look Asian. When she meets Wolverine in the story he recognizes her both by scent and by her face, despite the changes, which further drives home that she's just an altered Betsy.
Claremont and Lee leave. other creators come in. Fabian Nicieza is the write on X-Men around 1994-95 and introduces a mysterious figure who is revealed to be British Betsy. She confronts Psylocke and claims she's a Hand ninja who lied about being Betsy Braddock. Psylocke is confused and can't entirely refute this, and for a while they both hang out at the mansion with British Betsy calling herself Revanche.
Later Nicieza resolves this by revealing Revanche is a Hand assassin named Kwannon who was nearly killed on a mission and body swapped with a near comatose Betsy Braddock. Kwannon found out she had the Legacy virus and commits suicide, leaving notes that let Psylocke figure out that the reason they were both confused about who they were is that when Kwannon found Betsy they touched and their memories got mixed up, which is how psylocke learned to be a ninja.
Note that the existence of a second woman for Betsy to be body swapped with and the swap itself are both retcons. Claremont very clearly explains that it's plastic surgery in the original story, so Kwannon really only came to being as a retcon explanation to that story.