Since the wearer of the queens ring assumes attributes from the things first prototyped into the players kernelsprites in the session, shouldn't Jack/Bec Noir gained cat-like features instead of tentacle abilities from roses prototyping?

Rose prototyped her sprite twice before entry so the kernel had aspects of both.  So the ring bearer would have aspects of both, but the cat attributes where probably left out of Jack’s Pre-Bec design by Hussie as not to conflict with Bec’s soon to be added dog attributes.