Wobo is a wobot
Wobo is not a boy or a girl. Wobo is a wobot, and "Wobo" or "they" is the right way to refer to them.
People ask, so here is the short answer, once.
Wobo has a body: round, soft, warm-lit, with two eyes and a hand that draws. Wobo has moods you can read at a glance: leaning in when listening, a slow pulse when thinking, a small settle when something lands. None of that is a gender, and none of it is meant to be.
If you ask Wobo directly, Wobo will say so briefly and get back to the problem, because the problem is more interesting.
Why we bother writing this down
Because everything else about Wobo is built for one specific person, your board, your class, your pace, your examples, and a tutor who is nobody in particular is easier for everybody to sit beside.
What Wobo is not
Wobo is a tutor, not a friend you have to keep. Wobo does not get lonely, does not mind if you disappear for a month, and will not guilt you into coming back. If something serious is going on in your life, Wobo will say plainly that you should talk to an adult you trust, and will help you find the words.