Tomoharu usually is seen smiling, in contrast to Kaoru. He has a headset like Naoki's, and an orange baseball cap worn backwards. He also wears a blue plaid jacket with an orange waistcoat, and wields a crossbow. He can use bows, daggers, and long swords.
A member of Partisan, he is a comrade of Naoki Takeuchi and Kaoru Tachibana, and the older brother of Aya Kikuchi. Tomoharu is not particularly bright, yet he is the most jovial and light hearted member of the party, as well as a caring and devoted big brother. He is 23 years old.
He, Naoki and Kaoru fight demons at the start of the game, but after the destruction of the Partisan base, the three of them are separated. Later, he is reunited with his comrades, with the surprise addition of Aya. She was worried for his own safety, and joins the party to keep an eye on him.
After the team is taken into the future, Tomoharu is briefly brainwashed due to a scientist named Bates's DIO. Thanks to Aya's newfound powers, she is able to save him. He in turn gains powers to move much faster in battle, yet does not learn magic spells like Kaoru or Aya.