The mature and reliable head of the Iga ninjas. His legendary powers are acknowledged even by other clans. However he doesn't know much about love, and he's famous for being a bit "dim" in that regard.
He has studied medicine under many teachers, and he has been offered positions as a doctor by many feudal lords, but he has chosen to keep following the path to improvement to deepen his knowledge. Ren even came to Iga to further his studies. Some people are deeply moved by his desire to save lives. His only flaw is that once he falls asleep, not even an earthquake can move him. He tends to sleep anywhere he wants, which has caused considerable trouble in the past.
The leader of the Yagyu family, he's famous as a tactician as well as a swordsman, making both a good warrior and a good scholar. His actions are in the name of his family, and he is always rational. Few people know of his true feelings. The Yagyu family is known for its swordsmanship, but it seems some of them move around in the shadows just as much as ninjas do.
This master swordsman is known for fighting with two blades at a time. He doesn't belong to any clan or region and his sole purpose is to find strong fighters. He has no interest in anything but swords, and it is said he doesn't even think about anything else. Apparently, he's pretty cute when he's not carrying his swords, but once he grabs his blades, he becomes a merciless warrior.
An exemplary ninja, who is guaranteed to successfully complete any mission you give him. Considering the extreme difficultly of most of his tasks, this is saying enough. He doesn't talk much, and he doesn't seem to have many friends. It seems he's had a rough past...
He's still young, but he's considered one of the biggest assets of the Koga clan. He's as nimble as a monkey, he can fly from tree to tree, and he can take down enemies in a heartbeat. He still has some childish qualities to him, and he's pretty reckless, but those are some of his strong points as well. His cheerfulness is especially invigorating.
As a ninja he has great authoritative powers. He stands out a bit when moving on his own, but he takes his job seriously, and he can be trusted to do anything all by himself. However... He's quite a bit of a player.
A master of disguise, and more intangible than fog. He is especially adept at infiltrating enemy territory and gathering intelligence by using disguises. He may feel cold and distant, but he takes good care of his subordinates, and he is generally will-liked.