She has Runes hailing from Scandinavia, almost known as Scandinavian Magic Crests. It is said that she, a first-rate magus, has taught Rune Magic to her beloved Sigurd. Originally, it was a Skill that shows the power of the 'Primal Runes' granted to her by her father Odin, but her power is being suppressed. If she demonstrates the true power of this Skill without possessing a Divinity Rank of A or higher, in addition to receiving restrictions on the use of her Noble Phantasm, severe damage enters her spiritual core and Brynhildr will soon disappear.