There's something very nostalgic about standing in front of a large audience and walking them through scrolls and then expounding on the principles of magic. She has more to say at this point, though, she's dissected more spells into their component pieces and Olórin's been around for a while now to help explore vast combinatorial explosion. The lecture takes a few hours even with most of the content offloaded into "look it up, it's in the files". And then there is food and mingling for anyone who doesn't have to race off immediately to do important multiverse things!
"I have mine made so that it wouldn't hurt if I cut them off but I've never actually done it and frankly the idea weirds me out even though I was planning on the possibility. You will have to do it about a dozen times to keep having wings that are sized right for you, and more often if you ever want to not conspicuously have wings for some reason. I'd give it some thought if I were you."
"Did you give the cutting them off twelve times part a lot of thought, because it didn't sound like that had occurred to you before."
"I can probably invent a wizardry spell for it, or get an angel to resize them."
"The average random angel will assume you are, in fact, a demon, and dislike you on that basis."
"Maybe I'll go to Heaven with my wings and make friends there and explain to them that demons aren't bad."
"There is no explanation for someone claiming to be a demon being located in Heaven that doesn't involve interdimensional transit. You'd have to be a weird angel who made unconventional wing decisions."
"...and wants help getting my wings bigger because I'm stupid like all of the other angels and can't do it?"
"Well, being racist is different from not being very good at adjusting a set of wings, but it's not implausible that an angel would want help upsizing the wings."
"Or if I summon one then obviously I will be its summoner and therefore not a demon."
"Yeah, I guess if there's nobody else in the room who could've done it."
"And maybe there are angels who aren't racist or who can be talked out of being racist if someone is patient with them. Not me. I'm not patient. But someone. Maybe Leaf, people make sense to him."
"Oh, sure, there are non-racist angels, it'd just take some looking, or you'd have to go with somebody who died from Space Arda."
"You could get angels to upsize your wings with a considerable time investment by finding one who'd be willing to work with demon-style wings and knows enough to do it in lieu of removing and remaking, yes."
"Or maybe by then I will be a demon and then I can do the removing and remaking myself."
"I don't mind remaking your wings for you when they get too small, I'm concerned you would not be comfortable with the part where they come off. When you get used to them it's about as appealing as cutting off your arms."
"...uh, no? Your arms were not even made without nerves in the shoulders, that is a terrible idea."