I have answered this before but I honestly can’t tell you what tag it would be under so it doesn’t seem fair for me to not answer it again. (It’s also 2:30am so I don’t feel like hunting it down.)
Most Lolitas actually don’t just stick to one style. While many do stick to just one, it’s just a matter of taste (and sometimes funds). Some Lolitas only wear one style because that’s the only style they really identify with. But for many Lolitas, myself included, one style just isn’t enough. I like a lot of things, I like a lot of colors and themes and looks and because of that I try to give myself different style options so I can dress to suit my mood. While it is recommended to stick to just one style when you’re first starting out so you can work on building a versatile and workable wardrobe, there is no reason you should have to only wear one style of Lolita forever.

A flower crown would work very well with Archangel. Overall there is really a lot you can do with it considering how simple it is. The overall design is very clean, the print is pretty simple, you could do something very basic like how Mana is wearing it here, or you could do something very elaborate with printed tights, pretty black lace gloves, you really have a lot of freedom to play around with it.

Possibly but it would take a bit of creativity. The first thing I thought of would be to take inspiration from the ballet and try for an Odile theme so you can work off the theme of the print but also get that dark element. My first suggestion in any case would be to cover up the top part of the bodice because it looks very sweet so you could wear a nice black bolero. If you wanted to be really fancy and go with my Odile idea, you could do something with feathers, or even a combination of the two, a bolero to cover the bodice and something like this for added drama. You could then do some sort of Gothic styled crown for your headwear, maybe a crown of black roses (maybe one that includes feathers?) or a more literal crown. Then for your legwear you could do black lace tights and shoes that sort of have a ballet feel, possibly black rocking horse ballerinas or maybe just something with similarly styled ribbons/straps. Then you can add more Gothic elements to your accessories (purse, rings, earrings, maybe gloves). I’ve gone into a lot of detail with this one because I think it would be particularly difficult to get enough Gothic in there to drown out the Sweet.

Almost definitely not Punk unless you were to do quite a bit of alterations, but in black it could work with Gothic. Maybe in red or blue as well but I think it would take a lot of creative coordinating because the overall style of the JSK is pretty Sweet.

That’s definitely okay so long as the style of the jewelry fits the Lolita aesthetic. Skulls can definitely be pretty and elegant. For example, skull cameos work really well for Gothic Lolita.

As long as the color looks good on you and makes sense with the rest of your makeup it can work perfectly well.