I guess you should pick either of the two, and describe what signs you know and have seen in your coworker, for this to work. Otherwise, the answer might very well be that you're overthinking this, in which case this question is about
intrapersonal matters and not
interpersonal skills, which would be off-topic here. If you could clarify your question, it can probably be reopened. —
Tinkeringbell ♦ 41 secs ago