Kagami in cannon is clearly designsed to resemble Marinette in a lot of ways, both are of Asian decent and have blue-ish hair and blue eyes. Both have freckles and even their suits share a very similar color pallet. At least Luka was different from Adrien in more than personality.

I didn't want that for my Kagami. I wanted her too look like more than a Marinette clone. So she gets to keep her freckles since my Marinette doesn't have any. Her hair is a darker color instead of a blue, and her eyes take on a stormy grey color. And of course their body types are different, namely Kagami is both taller and ripped.

Ryuko's hair is more blue since I gave the miraculous blue, white, and gold accent to match the weather pattern on her chest. Her hair get's shorter, pinned back and is a bit more wild. It's probably got some static. Little horns and some armor to keep her extra safe as well as further resembling scales. Her suit is closer to an orange shade than Ladybug's cool red. I almost switched her to blue since I agree with the sentiment that the dragon should have been blue. But red looked good too.

I don't particularly like any of the akuma designs for Kagami. I like Oni-Chan in concept at least (hate the name) so I decided to combine that with Riposte to create her initial design. Than she gets a pallet swap and a few thorny details to represent the rose. And Bara-Oni, literally just 'Rose Demon' I ain't creative, when Lila pulls her stunt. Which would have less to do with "How could Adrien do this to me," to "That bitch is kissing Adiren when he is CLEARLY uncomfortable!"

Kagami's personality is very similar to cannon, however her character still has some pretty harsh changes. Kagami has come to realse through Adrien and Marinette's friendship that she isn't very happy with her life. Her mother is trying to live through her, forcing Kagami to participate in fencing and putting pressure on her to perform perfectly in every aspect of life.

This comes to a head when she is given Longg. While sitting in the akumatized mech her mother became, all because she had the audacity to make friends, she actually waits long (haha) enough for Longg to explain the miraculous. When Longg explains the weapon he points out that she must be thrilled to have a sword. At which point Kagami has an emotional breakdown and sobs that she doesn't even like sword fighting. That she would rather learn hand to hand combat and that she's wanted to switch for years but her mother refused to hear it.

Longg says her can change her weapon to better suit her, and she get's armor and the abilitly to summon gauntlets when her power activates.

After having this break she and Adrien sit down and try and find ways for Kagami to feel more like an individual without being disowned at 16. Cutting/dyeing your hair and getting a Tattoo are two of the results, and since Kagami already has short hair and doens't really want to go shorter she gets the tattoo instead. Subtly referencing her time as Ryuko but in blue (her favorite color). And of course her mother is blind and doesn't know