XDanime

Hitomi Nabatame as Kar Shekar, a loyal servant to her sovereign, and a close aide to the princess Arya.

Eri Kitamura as Lisa Lovelock, the commander of the Curse Unit of the U.S. Army, and good friends with Easy.

Toshiyuki Morikawa as Brad Blackstone, a highly skilled combatant whose motives are unclear.

Makoto Furukawa as Justice Akatsuka (nickname Seigi), a boy who had a strange rune engraved on his hand after saving a mysterious man. A user of Akatsuka-style Jujitsu, he is trained by his vigorous grandfather. His nickname is the Japanese word for Justice.

Chika Anzai as Tōko Ichinose, Justice's childhood friend and classmate.

Mikako Komatsu as Bluesy Fluesy (nickname Easy). A girl who suddenly appeared in front of Justice. She has the physical strength to overpower him.

Akari Kitō as Aryabahta, the princess of the Kingdom of Celistan. She strikes a beautiful figure, and comports herself with dignity, but her love of games is unequaled.

Shiori Izawa as Iltutmish, a girl who has pledged her allegiance to Ariya.

Kenjiro Tsuda as R.R. Lurker, a man who works under Ariya. A sadistic whip-wielder.

Yen Press is publishing the manga in North America, and it describes the story:

By all accounts, middle schooler Seigi is pretty unremarkable except for his martial arts prowess and a desire to protect the weak. But when his good intentions are put to the test by saving an old homeless man from some street thugs, the mysterious man shows his gratitude by...burning a tattoo onto Seigi's palm?!

It turns out, the tattoo is a powerful secret weapon that everyone--including a formidable girl with a tattoo of her own--is after. With his life on the line and his martial arts skills alone no match against super-powered foes, will Seigi be able to unlock the latent potential of his tattoo and live to fight another day?!