Rolonia is one of the heroes marked by the Six Flowers and known as the Saint of "Fresh Blood." She has the ability to control her own blood as well as any blood she comes into contact with. Despite wearing heavy armor, her appearance is rather docile, with glasses and a hesitant demeanor. Her cow-like helmet with horns and large fake ears adds to her unique look. In battle, Rolonia uses a long whip that's infused with her blood, allowing for extreme accuracy. A single hit from the whip can drain a significant amount of blood from her victim, usually enough to kill any kyouma or defeat a human opponent. To motivate herself during battles, Rolonia engages in a ritual of shouting and swearing at her opponents. Her power enables her to accelerate the healing properties of blood and stop hemorrhage, making her an effective healer. By tasting someone's blood, she can analyze it completely. Using this ability with kyouma's blood, Rolonia can determine their special powers.
Rolonia was originally a lowly servant in the Temple of the "Fresh blood" and was never part of the nuns. 2 years and half ago, when the previous Saint of "Fresh Blood" retired, a ceremony was held to designate the new Saint among the nuns of the Temple. However, the one who received the power from the god wasn't one of the nuns, but Rolonia who was washing clothes outside.
When she realized that she was chosen as a new Saint, she first wished to resign immediately and all the temple of the fresh blood agreed that this was the correct thing to do. However, for this she first needed the avail of the current head of Saints, Mora, who never gave it. When Mora came to the temple of fresh blood and saw Rolonia, she saw in her a potential really strong warrior and decided to supervise her training personally.
In order to make her more knowledgeable about kyouma, Mora sent Rolonia as an apprentice to Atro, an old warrior specialized in the hunt and killing of kyouma, for a few months. There, she met the 15-year-old Adlet who was currently training as Atro's disciple, and sympathized with him after healing his numerous wounds.