Jiro

Jiro is a young merman employed by Reishi Senyu as security for Kai Tylenn's rented alchemy laboratory. He is Jomei's twin and has a Yellow-grade profession, but his formal profession and skills are never named. His work combines watch duty, practical laboratory support, and armed readiness.

Biography

Starting a Business to Departure

Reishi assigns Jiro and Jomei to protect Kai's new laboratory. Jiro remains outside for hours because he interprets his orders and the propriety of entering another person's workspace strictly. Once Kai gives him keys and permission, he cleans and organizes the room without touching the cauldrons, locates instruction manuals, and helps obtain recipes and herbs. He openly admits that he has visited laboratories only twice and that alchemy is not his specialty, which keeps his assistance useful without pretending to expertise he lacks. (Chapters 121–124)

Jomei dies defending the laboratory during the pirate attack while Jiro is elsewhere. When Kai later returns, heightened security leads Jiro to level a spear at him before recognizing him and lowering it. He appears tired and grieving but remains on duty, guarding Reishi's quarters and eventually escorting Kai to his employer before departure. The source does not show Jiro discussing the loss at length, seeking revenge, or changing professions, so the effect of his twin's death beyond visible strain remains uncertain. (Chapters 131, 142, and 146)

Appearance and personality

Jiro is a young, muscular merman with dark green hair that looks almost black in low light and a thin scar on his chin. As Jomei's twin, he closely resembles his brother, though the chin scar helps distinguish him. No crest colors, clothing details, race grade, or cause for the scar are supplied. (Chapters 121–122)

He is reserved, formal, diligent, and anxious about exceeding his authority. He can stand watch for six or seven hours, refuses to intrude without permission, and handles laboratory property carefully. He is also candid about the limits of his knowledge and politely accepts Kai's food. After the raid, fatigue and grief make him look worn, but his quick spear response shows that caution has not lapsed. (Chapters 121–124 and 142)

Skills, magic, and the Guide

• Yellow-grade profession: Jiro's profession is identified as Yellow, but its name, type, skills, and acquisition date are absent. His race grade is not stated. No progression table can be built from a single undated observation. (Chapter 121)
• Guarding and vigilance: He maintains long watches, controls access, recognizes a returning client after an initial challenge, and guards Reishi's door. The text does not name a perception skill or demonstrate detection through concealment, so his sensory range and magical counters remain unknown. (Chapters 121–122, 142, and 146)
• Spear readiness and physical conditioning: Jiro's muscular build and immediate use of a spear establish training and readiness. He is not shown fighting in the supplied scenes, so reach, techniques, skill levels, and performance against graded enemies cannot be assessed. (Chapters 121–122 and 142)
• Laboratory support: He cleans, organizes, locates manuals, carries supplies, and helps pack products while avoiding the cauldrons. He explicitly lacks alchemical expertise; these actions do not establish Alchemy or another crafting skill. (Chapters 121–124)

No public power-progression table is supplied because the corpus records no dated advancement for Jiro.

Relationships

• Reishi Senyu: Reishi employs Jiro, assigns him to protect Kai's laboratory, and later trusts him with access control near his own quarters. Jiro follows those instructions closely. (Chapters 121–124, 142, and 146)
• Kai Tylenn: Jiro protects Kai's workplace and becomes more useful once Kai grants explicit permission to enter and handle ordinary supplies. Their exchanges remain courteous and task-focused. (Chapters 121–124 and 146)
• Jomei: Jomei is Jiro's twin and fellow guard. Jomei's death during the laboratory defense leaves Jiro visibly tired and grieving, but the corpus does not reveal Jiro's private response. (Chapters 121–122, 131, and 142)

Items

• Spear: Jiro points a spear at an unexpected arrival before recognizing Kai. No name, grade, or enchantment is stated. (Chapter 142)
• Laboratory keys: Kai gives Jiro keys so he can enter, clean, organize, and protect the rented laboratory. Their later disposition is not specified. (Chapter 121)