REDTAIL 22

More about Watanabe :

Her name is "Watanabe". She is the woman who will be buddies with MAKO who appears on earth. She is a member of a special anti-demon tactical unit called "Seibo"(meaning "Cuckoo wasp").

The tattoo on the left half of her body acts like a spellbinding sports medicine taping, not only enhancing her physical abilities, but also creating an efficient flow of spiritual power to the "shikigami" hidden in her head hair.

Watanabe is a descendant of "Tsuna Watanabe", who cut off the arm of "Ibaraki Doji" during a demon slaying in the Heian period (794-1185), and is a super-dreadful spellcaster belonging to the Seibo. She is also the one who was allowed to wear the sword of "Onikiri Yasutsuna" when the unit was formed.

This is a "shikigami" that was placed in Watanabe's hair. There are few people who have seen it, but according to one theory, it is six large weasels.
The spiritual power is amplified by the tattoo spell and flows into her hair, and from the braided hair into six "shikifuda"(Tags made of Japanese paper). It is said that the spiritual power is stored until just before it is used, and then torn off to be used.