Tsukihime Remake series
Rita Rozay-en is shown to be listed as one of the Ancestors on the list possessed by Arcueid Brunestud. She is called the Rose Princess (薔薇姫?) and her Principle is described as the ugliest of them. Lord Rozay-en is mentioned as an affluent Dead Apostle who transformed at the same time as his biological daughters. Dr. Arach seemingly has a connection with her and gave Noel her Mystic Eyes of Roses through her experiments of turning her into a Dead Apostle with the serum Idea Replica. It is implied that Dr. Arach's procedure can grant Noel some of Rita Rozay-en's other abilities due to the final injection causing Noel to sprouted thorny vines from her person.
It is implied that Rita was involved with the "French Incident" as one of the silhouettes of the Dead Apostles present during the Incident resembles her, and her presence is supported by the appearance of Dead whose bodies sprouted thorns among the those converted from the population of the town.
Within the original setting, Rita Rozay-en, known as Self-styled: The Artist's Lady (自称、芸術家のお嬢様, Jishō, Geijutsuka no Ojōsama?), is a typical high-class vampire with a liking for artistry. She is the successor of her parent vampire, having inherited their castle, where she takes a nightly blood bath. She is known for her arrogance, and for doing whatever she pleases. Possibly due to a crooked personality, she is never satisfied with her actions. She holds an odd friendship with Sumire; they have sworn to die by each other's hands.
Rita Rozay-en is a typical high-class vampire with a liking for artistry. She is known for her arrogance, and for doing whatever she pleases. Possibly due to a crooked personality, she is never satisfied with her actions.
Lord El-Melloi II Case Files
In the world of Lord El-Melloi II Case Files, there exists the manager of the Rail Zeppelin who is known as a Dead Apostle by the name of Rozay-en, who is either Rita Rozay-en herself or another member of her clan. The Dead Apostle fled from the train after a battle with Touko Aozaki. The Rail Zeppelin Deputy Manager is an emanation left behind by the manager afterwards.
Rita employs the use of ghouls whose bodies are wrapped in thorns, making them resemble humanoid cacti with roses sprouting out of them. She also possesses the Mystic Eyes of Roses (薔薇の魔眼, Bara no Magan?), the world's most beautiful, most unsightly Mystic Eyes; Rita's Idea Blood. They allow her to project her memories into other people's minds and implant a victim's mind into her body as a captive. She is able to forcibly remove the soul of her target and lock them away in her Mystic Eyes of Roses, where they experience an unending nightmare.
- Tsukihime -A piece of blue glass moon- - Rainbow in the Night route - Day 13: "Mirage"
Kagetsu Tohya - 27 Dead Apostle Ancestors Series, 1５／Rita Rozay-en
Typical high-class vampire.
Inherited her master's property. Does whatever she pleases. But never satisfied. Perhaps a fault of crooked personality?
Has a good relationship with Sumire. Thinks that when one dies, the other will probably be the killer. Uh... are they really friends?
- Lord El-Melloi II Case Files Volume 4: case. Mystic Eyes collection train (Upper) - Chapter 2 Part 5
 Lord El-Melloi II Case Files material - Encyclopedia: Rail Zeppelin [Other], p.109
The Mystic Eye Collecting Train [Other]
The stage of the Rail Zeppelin incident, which ushered in the second half of the Case Files story.
The ability to safely extract and transplant Mystic Eyes with one hundred percent certainty was limited to the Rail Zeppelin alone.
Though it originally only ran in the heart of Northern Europe, after being destroyed in battle by a certain Grand class doll maker, the original owner disappeared. Once the Rail Zeppelin had finally been repaired, it began to make appearances throughout the entirety of Europe, even being found in Britain, despite it being entirely surrounded by the sea. Miss Touko was really quite thorough.
The owner’s representative that appeared part way through is like a shadow of the original owner. Only Gray, whose spiritual sensitivity is extraordinarily high, or people like the conductor and auctioneer who had a connection to the original owner in life, can perceive her existence.
- Melty Blood: Type Lumina character profile