Heroic Rematch: Wants one badly after losing to Panther Risako. Unfortunately for her, the guys in charge at World Joshi don't want their image made any worse than it already is due to said loss and [[cancel the match. This backfires on them and World eventually has to close their doors.
Secret Identity: If the chosen protagonist chooses to befriend Maria and team up with her for awhile, said protagonist will become Darkstar Chaos, with the actual Chaos nowhere in sight. This, along with her in-game vitals and similar appearance, suggests that Maria is the actual Chaos prior to her Start of Darkness.
Extreme Omnivore: As shown during her vacation event, she'll eat anything she can catch and cook. Fish, clams, snakes, it's all delicious to her. Naturally, the President is more than a little reluctant to accept when she offers him some.
The Napoleon: As a child, her dream was to become a big, tough wrestler. However, her height ended up maxing out at a diminutive 149cmnote around 4'10. Naturally, she's more than a little sensitive about this.
Badass Adorable: Her babyface and adorable voice belie the heart of a true heroine.
Bare Your Midriff: Subversion. Rather than her entire midriff, her ring costume has a small opening at the waist that shows off her stomach.
Big Eater: One of her long-term goals in life is to conquer the national eating contest.
Bunny-Ears Lawyer: She's a goofball who claims to be a superheroine from the Andromeda Galaxy, seems to think that superheroes really do exist, and that her matches are battles between good and evil for the fate of the universe. She's also really, really talented in the ring, so very few people call her on it.
Corporate Dog: Often mockingly referred to as one by members of organizations she's not working for due to the fact that she always winds up being put into the position of bodyguard/tag partner for girls that the higher ups consider to be up and coming stars without so much as a single complaint.
Eyepatch of Power: Worn purely for effect as part of her costume. Both of her eyes function normally.
I Coulda Been a Contender: She was a champion freestyle amateur wrestler who had been made a candidate to take part in the Olympics, and rumors flew about her being a lock to take the gold medal. However, an injury kept her from taking part, and her frustration over this led to her acceptance of a pro wrestling career once her injury healed.
There Are No Coincidences: During her training days, she greatly wished for a bullying senpai and another that she respected to suffer humiliating defeat and capture a title, respectively. After both events wound up happening exactly the way she hoped, she starting thinking that she might have magic powers. When she managed to successfully predict the outcomes of a string of matches afterwards, she refused to believe it to be any kind of coincidence, and thus her staunch belief that she is a witch was born. Her profile makes it very clear that she actually has incredible analytical skill, but is completely ignorant of this fact.
Dented Iron: Spending three years as a child competing with adults in violent physical combat left her body on the verge of being completely trashed by the time she turned 14. It was only after Sonic Cat (visiting Brazil at the time and being begged by Diana's siblings to help her) allowed her to move to Japan as a live-in helper in Sonic's house that she managed to recover enough from her injuries to make a second debut.
Kuudere: She has a reputation of being an Emotionless Girl due to her calm, unflinching MMA-based fighting style and seemingly cold personality, but she's a gentle person at heart and shows it when interacting with those she likes.
Meaningful Rename: She renamed herself "Zero" due to feeling that unlike her Ojou stepsister, she herself lives a life without blessing or fortune.
Becoming the Mask: Her Meido motif was forced upon her by the organization she trained with as a way of boosting her appeal. Although she disliked it at first, she eventually came to embrace it and decided that if she was going to have to be a maid-themed wrestler, she might as well become the best damned maid ever to reinforce her image.
Sugar and Ice Personality: One of the rare examples where the "sugar" is on the outside, and the "ice" is reserved for her family, close friends, and people who especially anger her. She projects the image of a perfect and elegant maid in public, so those who find out about her strict, domineering other side tend to ask if she has a Split Personality.
Badass Adorable: She looks and acts the part of The Cutie, but she's also a survivalist who loves spending time in the wild and feels right at home just about anywhere as long as she has a knife and facial cleaning implements.
Exotic Eye Designs: Her pupils seem to contain lopsided crosses resembling stars in the night sky.
In Harm's Way: After spending most of her childhood traveling the world with her parents, she didn't take well to settling down and running a flower shop after her mother retired. Thus she became a wrestler to continue her old lifestyle.
In the Blood: Her mother was a popular wrestler and her father was said mother's manager.
Glacier Waif, Stone Wall: Her offensive abilities are frankly pitiful, but her defense is amazing despite her being one of the smallest and skinniest characters on the roster.
Red Baron: "The Cinderella With no Fairy Grandmother"
Stalker with a Crush: In her private events, she sneaks into The President's house and manages to stay there for days on end without him ever discovering her. At first he's a little creeped out when he sees her wandering the halls in a Modesty Towel after getting out of his bath, but eventually he starts treating her like an Unusually Uninteresting Sight.
Internalized Categorism: She often gets bouts of self-hatred because of her height, wishing that she could be small and cute instead. This is best seen in her private events, where she sits down on her knees and acts The President to pretend she's small and pat her on the head.
Ojou Ringlets: Her side-locks, as well as the rest of her hair done up into four large ones in the back.
The Hunter: She's apparently part of a secret organization that hunts supernatural creatures in order to protect mankind. It's dismissed in-universe as part of her gimmick, but certain conversations with her hint that there may be more than a grain of truth to it...
Masked Wrestler: To the point where she even wears her mask while at the beach on vacation.
Gold Digger: She attempts to seduce (and failing that, trick) the President after she catches him sleeping in his office following his having a bit much to drink in her private events. Upon his staunch refusal to give in, she clicks her tongue and admits that she was just trying to wrap him around her finger so she could do whatever she wanted with the organization's funds.
Red Baron: "The Downer Girl From Naniwa", "Shadow Princess"
Stepford Smiler: Subversion. Although she IS always smiling, she makes no attempt to act like a perfect, demure girl. However, her Empty Eyes are said to be a clue that at least part of her public persona is some kind of act.
Big Eater: During her private events, the President wakes up in the middle of the night to find Yuuri cleaning out his fridge because she doesn't think that what she gets at the dorm will put enough muscle on her to make her like her beloved "Chaos-sama".
Ms. Imagination: She's an occult maniac who claims herself to be the reincarnation of a familiar who served Aleister Crowley and joins the President's organization saying that he is her master's reincarnation and thus she will do whatever it takes to serve him.
Subordinate Excuse: It's hinted that it's simply more that she's taken a fancy to him and made up the above story to fit in with her love of the occult.