Yeah this pronoun would only confuse people

Alice: Who ate all the tangerines?

Bob: I did.

Alice: You did?

Bob: No, it’s Jeju.

Alice: But you said that-

Bob: No, my pronoun is I/me.

Alice: Excuse me?! How does this relate to Jeju?

Bob: That’s my pronoun.

Alice: … Why are we discussing pronouns now?