Kuomeleya doesn't read letters. She'd scrunch it up and throw it away. Then she'd stab you. Because knives are fun and letters aren't.
How would your villain have turned out if they weren't bad?
Technically, a "good" (by human standards) Malsmedis would have had no reason to exist and so would never have been built. She was the Aenigma's last-ditch effort to win an extinction-level conflict after all more potentially ethical solutions had been tried and failed, programmed to go as far as necessary to win on the premise that even if she were to scorch the earth, sew the salt, and then scorch the salt just to be thorough, that was better than the alternative. In her own words, she's not rescue. She's who the Aenigma sends to deal with situations that have escalated beyond rescuing. She's very much a protector gone wrong.
Therefore, I guess it makes sense a reformed (patched?) version of Bad Princess's eponymous character would be a protector gone
right, someone who didn't dismiss riskier strategies with fewer casualties in favor of "safer" scorched-earth tactics, or think of the very thing she's supposed to be protecting as an expendable resource in the quest for victory. More knight in shining armor, less "An Axe Knight approaches! Command?"
Suppose your villain won. What would their new goal be, now that they've achieved their old one?