Mainly good! He really feels like it's the most important thing he can be doing right now; if the Darkness threatens every world, and the fight is here, then being here for the fight is the most direct thing he can do to protect his world, and even before he knew that, he thought he'd probably stay just because he feels responsible for Aather and the people in Aather now, too. He doesn't want to leave a job half done! Besides, he's genuinely happy to get to stay with Sapphire and all his friends here. Aather also continues to present learning opportunities for Mau that he would never have at home, which he plans to take full advantage of for as long as he's around.

So there were a lot of factors to his decision, and he's very confident that it was the right one, and overall he's glad and full of teamdere and brodere and looking forward to the party. It's just that he's also gut-wrenchingly homesick. He could have gone home. He could be home in his Nation right now, today, and he isn't. He saw home for ten seconds like he was really there, and that's going to have to last him until he leaves... and who knows how long it will be until then? So he's going to take a minute to be devastated by himself, and then he'll go back to doing what he's doing.

How is Selenia feeling about Mau legacying?