Action & Fantasy:
* High School DxD: Similar to Sekirei in that it features powerful beings (fallen angels, devils, and dragons) and humans forming bonds with them. It's also full of action-packed fights, albeit with a more ecchi focus.
* Freezing: A female-led action series where girls gain special powers and fight against alien threats. Like Sekirei, it focuses on training, team dynamics, and romantic elements.
* Soul Eater: A group of students at a special academy train to become powerful weapons (weapons that can transform into human forms) and fight against supernatural beings. The action is exciting, and the characters are fun and engaging.
* Blazblue: A complex and action-packed series revolving around powerful fighters battling against a world-ending threat. While the story is more serious than Sekirei, it features captivating characters and intense fights.
* Guilty Crown: A sci-fi anime with a focus on mecha action and a unique power system. The protagonist gains the ability to manifest people's desires into weapons, leading to a morally gray conflict.
Romance & Harem:
* To Love-Ru: A classic harem comedy with a similar premise to Sekirei in that a protagonist gets involved with powerful beings, in this case, aliens. It features plenty of comedic situations and romantic developments.
* Rosario + Vampire: A school-based series where a human boy attends a school for monsters and falls in love with a vampire. Similar to Sekirei, it involves hidden powers and relationships with unique individuals.
* Date A Live: Another harem anime with a protagonist who dates spirit-like entities called Spirits, and seeks to stop them from causing disasters. It has action, romance, and a unique take on relationships with powerful beings.
Unique Powers & Team Dynamics:
* Witchcraft Works: Features a protagonist who accidentally gets involved with a world of magic and witches. It focuses on the dynamic between the protagonist and various witches who possess different abilities.
* Valkyria Chronicles: A military-themed anime with unique power systems and a focus on teamwork and strategy. The battles are intense and the characters are memorable.
* Code Geass: A politically charged series where a protagonist acquires a powerful ability and fights for justice. It features strategic battles, complex characters, and a thought-provoking story.
Choose based on what aspects of Sekirei you enjoy most, and enjoy exploring these other anime!