Origami

The Caging Hair (檻髪) is the ability of Tohno Akiha; it is a cursed field of plundering that is effective in the range of her field of vision. Being a half-demon, she can "plunder" the heat (lifeforce) from a living creature she can see, but the maximum output depends on time.

Akiha can start up the plundering once she has confirmed her target, and people who have a spiritual perception will see it as red strands wrapping around the target and char it down. At its maximum, the red strands cover the target as well as the entire area the target is in, making it impossible to escape - hence the name, caging hair.

The hair extend and wrap everything in crimson, but normal eyes can neither see nor touch it. Akiha's power reflects in the extension of these hair, but Akiha herself cannot see it, as she has no special mystic eye.

It is an absolute offensive against a normal person who doesn't have any spiritual defense, but it won't be any more of a hindrance than a spider web stretched everywhere to someone with a spiritual status on a whole different league such as Arcueid Brunestud. Although, with support, she could use it as shackles to restrain her.

Source: the dictionary resource at Jonnobi.