Also known as: 星河せいら, テネブライモード
Hoshikawa Seira's tenebrae mode (Magical Girl) form.
When transformed into this form, she has longer Two Side Up with glowing tips, along with a Very Long Braid in the center back of her hair. She has blue - purple Ringed Eyes. Crystal Horns form on her side of the head. She uses as her weapon the energy Bow (Weapon) and arrow that she makes emerge from a crystal on the back of her left hand.