Doppo Kunikida

Hey!”You're disturbing my sleep!
He said threateningly, turning over on the bed.

Kunikida extended similar faith to Ranpo Edogawa, as Kunikida actively participated in letting Ranpo believe Super Deduction is a real ability, since Kunikida, like the rest of his comrades, respected Ranpo's detective prowess and its value to the Agency.
Despite his well-rounded maturity level, Kunikida was also somewhat naïve and prone to easily believe Dazai's lies, including the "merit" of a noose when it comes to improving neck strength and that extreme shouting can cause hemorrhoids, which he later jots down in his notebook for future reference.
Kunikida valued human life, as he strived to save all innocent people during dangerous events in Yokohama. He stuck to this belief after seeing young people injured or killed in front of him. As a result, Kunikida never thought killing his opponents is the only option, and constantly looked to solve problems without bloodshed. Due to Kunikida's passion to try to protect the city and its people, Ranpo believes he is the strongest and most virtuous person in the Agency. This calm front begins to crack when he was forced to "bend the rules", resulting in a mental breakdown.
Kunikida's mental state continued to deteriorate after the Cannibalism when being hunted by the Hunting Dogs, and he loses self-confidence and "the light he always sees on the other side of the mirror".[19] His ideals were challenged by Saigiku Jōno, who calls them "big and lofty as a hot air balloon". He believes that Kunikida's ideals will disappear if his comrades die, and that he will feel "relief".
Kunikida deeply thought about this statement, causing him to re-evaluate his ideals drastically, and he says that idealistic thought alone won't save lives and that they must choose to be more realistic. By the end, Kunikida made a self-sacrifice, sticking to his desire to keep his comrades alive and telling Tetchō Suehiro that he "won't let anyone ruin his plans" and that he shall let his ideals soar with his "life as fuel".