|Japanese Name||立花 宗一郎 (Tachibana Souichiou)|
"I won't tell anyone who leaves behind leftovers." - Souichirou Tachibana, Chapter 1.
Souichirou is very passionate about cooking. He shares an outlook that wasting food is bad with Kazumi, and he is easily influenced by her requests. He tries to project a severe and no-nonsense demeanor, but inside, he is moved by sincerity.
Souichirou has so far only appeared in Kazumi Magica.
Kazumi awakens inside a suitcase, having forgotten everything except her name. When she forces the suitcase open, she finds herself in the home of a man named Souichirou Tachibana. Souichirou explains that he had bought a bomb in an identical suitcase, intending to blow up a shopping mall as an act of revenge against the mall's owner, who tricked him into selling his store. However, he switched his suitcase with another one when he bumped into a mysterious girl. Souichirou gets a phone call offering to trade Kazumi for the bomb at the mall. Kazumi goes along with it to find the identity of her kidnapper. While being taken to the mall in her suitcase, Kazumi asks Souchirou not to set off the bomb, saying that he's a good person. When he finds the other suitcase, Souichirou is stopped by two high school girls (though the next chapter calls them middle-school girls), named Umika and Kaoru. They open the suitcase containing the bomb, starting the timer. At this point, a squad of police officers led by a female detective named Misako Ishijima appear, telling Souchirou he's under arrest. Kazumi jumps between them and announces that Souichirou is not a bad person. Souichirou is unable to stop the bomb, which is close to exploding. Kazumi closes her eyes and thinks "Stop the bomb. Bibbity Bobbity Boo", causing her earring bells to glow. At this point, Umika passes the bomb to Kaoru, who kicks it into the air. It then harmlessly explodes into smoke, shocking nearly everyone. The mysterious girl from before, who was watching, mutters that the bomb was supposed to be real.
Kazumi and Souichirou part ways, but some days later, they meet again, when Kazumi is feeling depressed. She notices Souichirou closing his shop. Her serves her a bucket of parfait, much to her delight, and reveals that he was the made the manager of a new store. Kazumi then has a vision of Airi and Yuuri enjoying the parfait, prompting her to suggest that Souichirou should put the desert on the menu. Souchirou declines, saying it's not profitable. As Kazumi continues to eat, she suddenly begins crying, saying that Yuuri and Airi couldn't have eaten this. Eventually she falls alseep. Souchirou pulls a blanket over her and puts the parfait on the menu. The chapter ends with the sleeping Kazumi holding Yuuri and Airi's spoon. The next morning, Kazumi thanks Souchirou for the food, and becomes overjoyed when he puts the bucket of parfait on the menu. She leaves when she spies Nico and Jubey walking by.
Soon after, Misako Ishijima and Kazumi come to his shop after Kazumi discovers the truth behind her lack of memories and meets Ishijima during an investigation, though she does not remember what happened the last time they met. Kazumi eats and falls asleep while Ishijima and Tachibana talk over coffee and discuss that miracles and magic exist
Over the next week, Kazumi stays at Tachibana's shop, although he dissaproves of Kazumi running away. After several days, Kaoru drops off Michiru's diary, with a letter to Kazumi in it. Kaoru's letter informs Kazumi that Umika, Saki, Mirai and Nico are planning to kill her, and urges her to run away. Kazumi and Tachibana have one final meal of strawberry risotto, after which Kazumi tearfully says goodbye to him and thanks him for everything he has done to her and leaves, although Tachibana is not able to understand her.
- Souichirou is the only male human character of any importance in Kazumi Magica.
- He is called "Tachibana-san" (or "Mr. Tachibana") by Kazumi.