Mikoto Saimyōji, a forensic specialist assigned to "troublemaker" cases across Tokyo jurisdictions, bears a name reflecting its components: the surname Saimyōji (西明寺) combines "west," "dawn," and "temple," while Mikoto (水琴) signifies "water" and "musical instrument." He presents as a young man with short brunet hair and characteristically "usually dead" eyes. His standard attire features dark-hued T-shirts with minor sleeve variations paired with light-hued trousers during fortune-telling shop visits. Professionally linked to detective Tsubaki Iwanome, Mikoto once compared detective work to gamma knives—an analogy later proving useful to Iwanome in solving the Fire-breathing Bug case. Mikoto previously sustained a right leg injury that improved to unaided walking, though not full recovery. Approximately one week after Corpse God's reincarnation, Mikoto visited a new Shinjuku fortune-telling shop to test the proprietor's occult legitimacy. Corpse God accurately identified his medical profession and recent leg injury, telekinetically moved a pencil, and warned of misfortune if he didn't curb his video gaming habit. This encounter convinced Mikoto of genuine occult phenomena. Roughly two weeks later, he returned to the shop, encountering three customers in queue: two female students (one a Bug) and Phantom Solitaire in disguise. Filling out a survey form, he affirmed his intent for a reading, declared himself a "huge fan of the occult," cited his prior verification of Corpse God's abilities, and resolved to visit daily whenever possible. During a subsequent visit amidst crowds drawn by Solitaire's rooftop incident, Mikoto overheard Civil's group sensing "chills," attributing this to Corpse God's otherworldly power. He showed Civil footage of Solitaire evading "invisible hands" and debated public interpretations, arguing Solitaire's actions were uncharacteristically unpublicized for a nighttime stunt. He humorously suggested Solitaire might be rehearsing an "elaborate dance routine," sparking shared laughter with Civil over the romanticized image of "a mysterious entity and a crook" dancing together. When summoned for his reading, he provided his name to Civil and suggested contacting him via social media. His Twittia handle is '@mikoto_kansatsu' under the name 'MIKOTO,' boasting 14,000 followers. His given name remained unrevealed until 51 chapters after his debut appearance.