Rurushi Ru

Rurushi Ru (ルールーシー＝ルー), also known as the Vampire Princess, is a vampire. She appears to be "Daywalker" type Vampire, which allows her to be active during the day like normal humans.

Abilities
Like all vampires, she drinks blood to revive her vitality and magic strength. When her energies are low, she can reduce her size/age to conserve energy. Her magic allows her to create shields/barriers and project illusion of magic clothes. She also notes she does not use her magical abilities in combat due to it tiring her out and reducing "firepower" in physical battle.

She has a keen mind, is knowledgeable about politics of her region of the world near and around the Forest of Death.

Aside from being a famous mage and well-known pharmacist, Ru is also a celebrity in making magical tools.

Tia
She once belonged to a kingdom and was frenemy with Angel Tia. However, "trouble" accrued in the Kingdom, in which these events forced her to flee the Kingdom.

HIrako Machio
Ru is Hiraku's first Wife and the one to birth his first Child, She loves her husband and is always kind and supportive, she tells him to take breaks and not overwork himself, Ru met Hiraku when Kuro's pack attacked her in defense of their Home, Hiraku called them off and Ru bit him and drank his blood to heal herself, this resulted in the Infernal Wolfs attacking her again as she did just bite their master, Hiraku told her that it didn't hurt and allowed her to Drink his blood again, after she was healed from her injuries Hiraku showed her around his home, later that evening Hiraku asked her to marry him as he was so lonely and wanted company, Ru accepted and an over happy Hiraku jumped on her and it was implied that they slept together,

Even though Ru loves her Husband she had trouble handling his restless nights of Passion so she recruited other girls to help lighten the Burden she also used her magic to make herself look more childlike to ensure Hirako controlled himself around her but would take her true form when she was willing to sleep with her husband

Alfred
Ru is the mother of Alfred she loves her Son and happily dotes on him along with her Husband,

Ann
Ann serves Ru as her maid, However Ann cannot tolerate her sloppy Life style and during the tournament Ann when fighting Ru snapped and told her about how she hates how she never puts anything back and how her room is such a mess. Ann was the one who helped Ru Deliver Alfred

Sena
Sena and Ru get along well, In the Anime When Ru went into Labor Hiraku was too scared to stay with her so Sena volunteered to stay with Ru and hold her hand During the Delivery preformed by Ann

Flora
Ru is Flora's Cousin and they get along Ru is happy to let Flora spend a night with her Husband too and is supportive

Lupumirina
Lupumirina is Ru and Hiraku's second Child, as her Mother she loves and nurtures her

History
Having eluded her pursuers, she entered the Forest of Death, which eventually she would encounter a human alone farming. Inferno Hounds who happen to be living with him would rush to defend their master. However, the farmer holds them aside being happy see another "human". Desperate for energy, she bites on him and her vitality returns. However, seeing this as an attack. The inferno hounds attack her yet again until stopped by the Farmer, who tells him he is Hiraku Machio. He allows her to drain some blood to revive her strength. She interns from his kindness to allow her to stay at his humble home in the woods, develops a relationship with him and refers to him as "Honeybuns".

Trivia

 * Ru has been noted as "the Vampire Princess" on manga chapter 127. This hasn't clarified if she really is royalty.
 * Though she never had a ceremony with Hiraku, they consider themselves married.
 * In the anime near the end of episode 10, it's indicated that she is pregnant with Hiraku's child. In the manga, Ru becomes pregnant in chapter 25.