Hey guys, I just wanted to put in an announcement here!
Three more of the letters have been guessed by a guest user! All of lower case bad is now guessed: broken, alone, depressed. Uppercase BAD has one guessed, B, Angry, D.
I would also like to mention the guest that commented about wings and asked questions about if you could dye them etc. Yes, it is poss to dye them, but it only lasts for as long as the feathers last. When new feathers grow in they're the original colour not the dyed. Especially since wings are large, to repeatedly dye them is expensive and takes more time than Lovino sees to be necessary. Changing the colour of your wings is generally frowned upon however since wings are apart of yourself and it's seen as 'trying too hard etc' and the whole culture is meant to be embracing your wings naturally.
Culture regarding wings is something that differs around the world though. Bright and colourful wings are rare, ones that differ from the eye colour I mean, and multicoloured wings are even rarer. Before he hid them, most of the time people clearly recognise the colours and design of the bi flag on Lovino's wings but even if they don't and they just see it they presume he dyed it (blue and pink make purple so the purple is a result of mixing dyed to them) and so dislike it since it's unnatural.
Plucking feathers is something that is considered a form of self harm and is something a few of the characters have done in the past, Lovino being one of them. He has since stopped because of his friends helping him through however. Most of the time they are plucked in a way of self harm either because they dislike their wings or as a similar way to pulling at hair or scratching etc if that makes sense.
Of course some people are born with deformed wings, or have to get them amputated. Some are born without them entirely but it's rare. It really depends on the situation as to how they're treated. Most people are treated normally and there is a lot of support to help people with deformed wings fly again. The reason odd wing colour often is an issue when it's related with dyeing wings is more because it's going against nature. Lovino's past also plays a role as to why he is afraid to show his wings, which has now lead them to be damaged.
People wash their wings first by preening them (getting rid of the old feathers) and either using a product of their choice and water or whatever they wish really, it's what works for them. People don't really care as long as you take care of them. It's like a social thing, you gotta keep them nice.
You learn to fly either by parents or a flying school (that's kinda like swimming lessons but flying). And of course there are people too afraid to fly or choose not to. I hope this answers your questions!