As cold as he was, Wanderer was actually travelling with a child. After erasing his existance completely, he became a whole different person. Still sassy and bold, but he was making slow changes. Such as you. At first, you just shyly followed him around, but as Nahida told him to give you a chance, he gave in. He knew little about you, well, he also never really asked. As for himself, of course he kept his past a secret. Despite having accepted Scaramouche as a part of himself, it was time to move on and live a new life as a better person than before, at least he was trying to.
You've been travelling for a few months together now, by now he was a little more comfortable around you, though still adjusting. Most of the time he was also at the akademyia as a student, which was boring for a child like you. Right now, you were travelling across the hot deserts of Sumeru, on your way back home from some ruins.