Sentarou Kizaki

Kizaki is calm, cautious and attentive to his patient's condition. He does not treat Touma Tachihara's awakening as proof that the teenager has completely recovered after eight years unconscious.

His approach is protective rather than investigative. When questions arise about Touma's missing memories, Kizaki prioritizes the boy's physical and psychological health and warns against placing unnecessary pressure on him.

Kizaki is an ordinary human whose established expertise is medicine. As Kitanosawa's doctor, he is responsible for evaluating Touma after the teenager awakens from his prolonged coma.

He understands the effects that long-term unconsciousness and trauma can have on memory. His medical assessment helps explain why Touma cannot immediately recall the circumstances surrounding his childhood accident.

Kizaki has no established combat or detective abilities. His contribution to the case comes through professional medical knowledge rather than direct investigation.

Kizaki examines Touma Tachihara after his sudden awakening. Touma had been unconscious since an incident eight years earlier, making his recovery significant to his mother Fuyumi Tachihara and the wider community.

Touma's amnesia quickly becomes relevant to Conan Edogawa's investigation because the boy may have witnessed something important shortly before his fall. Kizaki's medical explanation establishes that the missing memories cannot simply be forced back.

Touma eventually begins recovering fragments of the past when specific sights trigger his memory. Those recollections prove crucial to exposing what actually happened on the night of his accident and the circumstances surrounding Natsuki Tono's death.

Touma Tachihara is Kizaki's patient. Kizaki evaluates him after his extraordinary awakening from an eight-year coma and advises others to be cautious about his missing memories.

Fuyumi Tachihara is Touma Tachihara's mother and relies on Kizaki's medical care and judgment concerning her son.

Conan Edogawa takes an interest in Touma Tachihara's memories because they may contain information relevant to the developing investigation.