Rosario to Vampire, Itsuka Tenma no Kuro Usagi Recommendations
Supernatural creatures of all kinds with central character being powerful vampire girl. Story is much more light-hearted than you might expect from such setting. Visuals are also very bright and colorful, especially in Itsu-Ten.
Both series revolves around a vampire who wields immense strength. The vampires are females who coincidentally falls in love with the male protagonists that are regular humans. Later on as the story progresses they desire to become stronger to be able to protect the one they love, which in this case is Moka and Saitohimea. With split personalities who shun them away and unbelievable enemies to fight the male leads Tsukune and Taito struggle to truly be by their side as a lover that can also protect them.