Reina bears a great resemblance to Yukina Himeragi, but there are a handful of differences as well:
- Her hair is pure black as opposed to her mother's dark brown hair, she is taller and she has a larger bust, though it's unspecified if these last two differences are due or not to Reina having travelled back in time up to when her mother was one year younger than her.
- She has blue eyes like her father while retaining her father's red eyes when she gets excited.
Despite the similar appearance, Reina is very different from Yukina Himeragi. When she first appears she's shown to be rather ditzy: she attempts to walk into a door because she thought it was automated, and makes various comments about the younger versions of people she knows, apparently without realizing that, by doing this, she would have just blown her cover. Besides this she is mostly friendly and not overly serious. She like her father have an afinity for nosebleeds and this so happens when they're either sexually aroused, or when excited gazing upon beautiful people.
However Reina case is different. When Reina saw Asagi Aiba (Reina's step-mother) in her youth, she became overwhelmed by her beauty that when she started describing her physical attributes that, all the thoughts that accumulated inside her became too much and it lead her to bleed from the nose.
EX: Yukina Before / After
Reina comes to the past to track and eliminate a dragon that escaped from a lab from the future.
Broken Holy Spear
Vampiric Abilities: As a vampire, Reina possesses superhuman strength, speed, reflexes, and durability. Her regeneration was demonstrated when a dragon stabbed through her stomach with its tail and she had recovered within a few minutes.
Magic: Reina has demonstrated using magic like her mother.
Immortality: Reina has inherited curse of immortality from her father.
Hasta Aurum / The Golden Spear: It is an intelligent-type weapon capable of producing and manipulating lightning. It's appearance is almost identical to Yukina Himeragi's Schneewalzer, though hers is gold while Yukina's is silver. So far, she has demonstrated the ability to turn the head of the lance into lightning and have it wrap around her target while still being able to cut things.
カレイドブラッドの血脈を継し者、暁零菜が、汝の枷を解き放つ！」 「疾く在れ（おいで）、槍の黄金（ハスタ・アウルム !
"Kareidoburaddo" no ketsumyaku o tsugishi mono, Akatsuki Reina ga, nanji no kase o tokihanatsu!（oide）、yari no kogane （hasta・aurum) !
- The name Reina means "zero" (零) (rei) and "vegetables, greens" (菜) (na).
- Reina's surname Akatsuki means "dawn, daybreak" (暁).