BE REALLY OBVIOUSLY OVERJOYED AND SO HAPPY ;_;!!!! ... But things also depend on whether or not Mitsuki remembers the White Rabbit in his starter or not. SPOILERS: one will lead to a healthier reaction than the other. In general, Drift's main priority would be to secure Mitsuki's dere again and to make sure he is the most important to Mitsuki :E (One of his biggest fears is that Mitsuki will come to Aather and end up loving his team/someone else more than he loves him, if he does at all. So if Mitsuki ends up on a very team-centric team, then... :'B) THIS WOULD MOSTLY BE ACCOMPLISHED BY HANGING AROUND HIM A LOT AND DOING CUTE THINGS FOR HIM so it might seem fairly innocent, but!!

The ~worst~ things that have happened to your characters in Aather? You can interpret that as you like.