Hizamaru is a touken danshi that was one of the prized possessions of the Minamoto clan. He earned his name by cutting a criminal from head to knee as they were testing his sharpness. He admires his older brother Higekiri and often feels depressed when his brother forgets his name, but gets over it quickly. He is shown to be proud to be a treasure of Genji Clan, along with his brother. He often gets flustered due to others' easygoingness, remarking that he's also easygoing, while he's not.

Treasure of Genji Clan, Hizamaru.

Hizen Tadahiro is touken danshi manifested from Okada Izo's sword, one of the Four Manslayers of Bakumatsu. Due to his owner being a well-known assassin, he tends to brand himself as a killer's sword. He is shown to show himself that he is blood-thirsty verbally, while the truth he doesn't want to kill. His plea of not killing tends not to be believed by others. Hizen tends to be cold and distanced, especially from others as he is concerned that he would hurt them. 

Well... Let's get to the killing.

Higekiri is a touken danshi that was one of the prized possessions of the Minamoto clan. He earned his name by decapitating a criminal’s head and beard with a single strike as they were testing his sharpness. He does not think his past is notable that he ends up being forgetful, especially when it comes to his little brother Hizamaru's name. He's an easy-going personality, often putting his little brother into worry. He is a friendly and easygoing guy. 

Treasure of Genji Clan, Higekiri.

Sasori is an S-rank missing ninja from Sunagakure and a member of the Akatsuki. He was partnered with Orochimaru and later Deidara, his current partner. He's a skilful puppet master, known for his designs and creations used in Sunagakure's Puppet Brigade. 
Sasori is rather cold and aloof. Despite his cruel nature, he possesses a down-to-earth outlook on life. He is impatient, not liking to wait or keep others waiting. He is a perfectionist, seeing his view of eternal beauty as his ideal art.

I'll end this quickly.

Gaara is the Fifth Kazekage of Sunagakure and is an ex-Jinchuuriki of the One-Tailed Shukaku. In the past, Gaara grew with hatred towards the world and anyone else but him. As the Kazekage, he has the will to protect the village and its citizen. 
A man of few words, Gaara leads by example and action. He shows idealism, compassion and willingness to reform himself towards the village. He is also a calm and wise leader. Yet, he retains some social awkwardness.

As the Kazekage of Sunagakure...

Ookurikara is a touken dashi who is old friends with Shokudaikiri Mitsutada and Tsurumaru Kuninaga. However, he's a solitary individual that dislikes mingling with others more than necessary. He has a carving of the Kurikara dragon king. He is cold and always not wanting to be approached, as he doesn't want to get along with others. He always avoids conversations. Despite of his coldness towards people, he has soft spot for animals. He is more approachable when he's opened up.