I really should make a muse list at some point
I dunno if I've recommended her to you before, but:
You'd make an excellent Signum.
Not canon-familiar admittedly but she already looks like a character I'd fuck with
Serious, no-nonsense knightly type with both a berserker battle side and a loving big sister side.
Also Hayate likes to fluster her by groping her boobs.
by this logic I would be recommending to you... Maria from Symphogear. Maternal type, whip sword, she tries to be no-nonsense but she's honestly just a disaster.
and alternatively to that, Tsubasa
If there were a fission technique as an opposite to fusion, those two would be Signum's two halves.
signum is the tsubamari love child, despite coming first
yeah given the description of Signum, I can see it xD
Kinda wanna drop you into the DCAU and see who falls out
Which is great, but I mean the good ol' days of Batman and Superman animated series and Justice League.
Supergirl is probably up there as a contender
and classic Harley and/or Ivy
I'd also point at Livewire or Volcana - you have the energy and verve for them. Or maybe Wonder Woman or Hawkgirl
Wonder Woman is very possible
Hmm, did the green lantern rings have any women holding them in the classic stuff?
Katma Tui and oh, what's her name...Ariana, I think.
but yeah almost certainly Supergirl could happen when I have the brain for some canon review
Well, I have a
bunch of characters there for you to bounce off of if you do
alternatively from a YGO side of things, you might like... I could pick a few from Arc-V, honestly
if you want a stupid boy, there's Yugo. If you want a sad boy, there's Yuto. If you want a sad boy who masks it with a smile, there's Yuya. If you want a gay disaster girl, there's Masumi
yuya's also stupid, to be clear
OddEyes: ooh tell me more about Masumi
So Masumi Kotsu is a Standard Dimension duelist (so the dimension Yuzu's from) and is introduced as part of a trio as the three best duelists from LDS' respective summoning courses, being the Fusion duelist of the three (see: her on the left)

She's also introduced as Yuzu's first rival, though she sadly gets left out later on
(this is a common problem within arc-v that one has to get used to)
She uses Gem Knights and is very confident and straightforward, and while she has a penchant for mockery when she deems an opponent as being beneath her, but is caring towards people she's fond of, and fierce when it comes to their well-being.
She beats Yuzu in their first duel, in part because of Yuzu being unfocused and hesitant, which she wasted no time mocking her for. Yuzu then proceeded to learn Fusion Summoning to get stronger and beat her in the rematch, though.
At which point the gay disaster part comes in, because at this point Masumi is about to fall from a considerable height and is saved by Yuzu's monster, at which point she looks up to see Yuzu smiling, relieved, and—
and then she gives Yuzu a card that in the TCG has an effect that functions for both archetypes and let's face it in this franchise that's basically a marriage proposal

and later on got some more support reminiscent of it
one of the key animators also drew this, so
Came back all the way from yesterday because I forgot about a Green Lantern lady: Jessica Cruz! AND I forgot Jade, daughter of the original Green Lantern.
c_for_characters: ooh okay I did know of Jessica Cruz but didn't know if she was in classic DCAU
Jessica was in...one of the Green Lantern movies, I think?
Jade I don't think made it into the DCAU, I thought you were asking more generally
Oh yeah I love Jessica a lot. She was also super adorable in the DC and RWBY crossover.