Minister of light!Wels is my favorite creature and whoever first made him into a moth has my whole heart and soul. Especially when I then remembered how fragile their wings are if you rub the scales off.
Headcannons ahead
He got to season ten and was surprised when he logged on with moth wings & tendencies. The wings aren’t able to carry him around with all his armor, so when he gets his elytra it’s the two combined sets of wings that allow him to fly.
He learns fast that he can’t get his wings wet. Like, it just won’t happen, water slides right off. But he also learns that he can’t touch them because the scales are super quick to flake off and, while it doesn’t hurt, it affects his ability to fly and makes balance extremely difficult.
He can see just fine in daytime and nighttime, his eyes going from light adjusted to dark adjusted, (it looks like moths do this??? Absolutely bonkers stuff) and his eyes look white in darkness.
Adjusting from dark adjusted to light adjusted perception is fast, whereas going from light adjusted to dark adjusted takes longer so he volunteers to be the minister of light. That way, most spaces will be lit up at night and he doesn’t have to adjust from light to dark as often.
Imposible to hide his wings since covering them would damage them
He’s prone to walking and talking, and the other hermits will catch him by the front of his chest plate if he’s about to walk backwards into something
Wing flutters when he’s excited
He sees in greyscale at night, and gets jumpier since his eyes are hypersensitive to movement and not necessarily any better at perception than usual.