What I like about Tatsu Yamashiro so much is that it feels like there are a lot of aspects to her personality.
She can be a cool, sword-swinging badass who punches out crooks while hopping over rooftops, but also gets cute and blushy when her boyfriend makes her dinner and dotes on her. Still, when danger strikes, she can go into full body-guard mode, dragging Jason to safety and not having time for smooches.
She punches out ninjas, globe-trots, and worked for the CIA, yet also enjoys playing videogames in her off time. She can be snarky and sassy with Batman, but also expresses realistic fear, despair, and anger under extreme circumstances. Finally, after a long day of crime fighting, she likes to make herself a big ol’banana split to celebrate.
Basically, I like how she has little hobbies, quirks, likes, and sentimental aspects to her personality. There’s more to her than just a non-stop action hero with a big blade; she’s a human being.