Ohm

Ohmu / Priest Ohm · alive · Enel / Upper Yard

Arc-by-arc updates

Skypiea — defeated by Zoro (Ch. 272)

• Defeated by Zoro — shown beaten and lying down among the ruins (pp. 14–15); the Ordeal-of-Iron priest falls before Enel’s intervention.
• His combat dog Holly is knocked out alongside him after Zoro commands it “Stay.” / “Bang your head and pass out” (p. 15).

Skypiea — vs. Zoro: the shapeshifting iron-cloud sword (Ch. 271)

• On-page; the duel with Zoro continues over the ruined city. Intercepts Wyper’s bazooka fire with “Eisen Whip” (pp. 8-10).
• Demonstrates the shapeshifting iron-cloud sword: “This sword is iron cloud! Do you think clouds always stay the same shape?!” — the Eisen-Dial blade reforms into Eisen Whip / Eisen Back / Eisen Fan / Eisen Wave and an “Iron Wall” defense (pp. 12-14). Builds on the Iron Cloud / Eisen-Dial mechanic he introduced Ch. 268. See Dials Skypiean Sea-Shell Technology, Iron Cloud Eisen Dial Hardened-Cloud Weapon Debut.
• Mantra in a sword duel: strikes a target he cannot see via Mantra — but Zoro counters by reading Ohm’s own position the same way (“I can tell exactly where you are… from your Mantra!!”, p. 14, 17). First on-page instance of a blue-sea swordsman reading a priest’s Mantra. See Mantra, Mantra Is The In-World Observation-Haki Precursor, Mantra Power Of The Faithful Observation-Haki Precursor.
• Deflects Zoro’s “108 Pound Phoenix” with a wall of iron cloud (pp. 18-20) — chapter-ending clash, mid-duel.

Skypiea — vs. Zoro opens (Ch. 269) — the iron-cloud homing sword

• On-page; opens his fight with Zoro at the top-tier ruins. Reveals his sword is an iron cloud that “pursues its target forever!!” via a Dial in the blade, used like a whip (p. 11) — building on the Iron Cloud / Eisen-Dial mechanic he introduced Ch. 268. Hunts contestants with his white sniffer dogs (“Holy/Holly”) to dig them out of the ruins (p. 14). Declares “…since none of you will leave here alive.” (p. 22). See Dials Skypiean Sea-Shell Technology.

Skypiea — Ordeal of Iron (Ch. 268) — Holly + the Iron Cloud introduced

• Drives Gan Fall (on Pierre) and the wounded crew; taunts Gan Fall over his earlier loss to Shura (“even after a louse like Shura beat you?!”, pp. 1-9).
• Introduces his combat dog Holly (taught to walk on two legs and fight hand-to-hand, pp. 7-8) and the Iron Cloud (Eisen Dial) — hardened cloud “as light as a cloud but as strong as iron,” produced by Milky Dials, with hidden ground switches (pp. 13-14). See Dials Skypiean Sea-Shell Technology, Iron Cloud Eisen Dial Hardened-Cloud Weapon Debut.
• A giant poisonous serpent is under his command (pp. 2, 6). Probes Tony Tony Chopper (“friends from the blue sea… why were you here alone?!”) and reads the crew as “idealists” (pp. 12-16).

Skypiea — central ruins (Ch. 267) — intercepts Wyper at the Giant Jack

• The Ordeal-of-Iron priest appears with his white dog Holly, intercepting Wyper at the foot of the Giant Jack (“OHM!! Who let you pass?”; “Wyper, if you keep climbing you’ll reach the kami’s temple”) (pages 12–13).
• States his “six-year mission is finally coming to an end” and that he “came to bid you farewell” (pages 14–15). Confirms Enel is not at the temple and the kami’s forces have moved (page 15).
• Standoff catchphrase: “No one can escape my Iron Challenge!!” (page 16) — telegraphs his Iron-Cloud / Eisen-Dial style (mechanics not yet shown). Demands to know “where the kami’s forces are” (page 17). See Skypiea Survival Game and Heavens Punishment.

Skypiea — Ordeal of Iron (Ch. 266) — self-names on-page; declares the Iron Challenge

• Introduces himself on-page: “Quiet. My name is Ohm” (p. 9). Tall, lean, winged Skypiean priest in white; wields a sword and fights alongside a giant white dog, Holly (“It’s just Holly, my trusty canine sidekick… he won’t attack unless I command it”).
• Nihilist doctrine: humans are “born hoping for happiness and destroy each other in their pursuit of it… one can’t escape human nature… there is one path to salvation” → “They must all die.” (pp. 10-11)
• Confirms the elimination tally: Chopper is the “third one today,” and “you defeated Gedatsu.” (p. 8) — see Skypiea Survival Game and Heavens Punishment.
• His Ordeal named: “Iron Challenge!! Here, the survival rate is zero percent. There is no path of life, only the way toward sadness.” (pp. 19-20)
• Etymology Oda-confirmed this chapter (SBS, p. 20): Ohm = “Om” (ॐ), the sacred Hindu symbol (see frontmatter etymology).

Skypiea (Ch. 254) — summoned to Enel’s temple

• Captioned “Skypiea Vassal ‘Sky Breeder’ OHM” (page 8) — bald swordsman with a long blade and a bell-tipped pommel/mace and large spiral tattoos. Threatens Shura: “I’d be happy to show you just how worthless your powers really are.”
• ETYMOLOGY/MIRROR flag: bell-shaped pommel weapon may foreshadow the Giant Bell of Shandora.

• Among the Priests who repel the Shandian guerrilla assault. He is pulled out of pursuing the retreating Shandia (“Wait, Ohm!!!” / “You’re not going anywhere”) because “Kami Eneru… calls” (p2-3).
• Shown with a large cloud-wolf. (His white combat dog Holly is named/shown in Ch. 266 — now minted and cross-linked.)
• Etymology candidate (priest religious-naming motif — see frontmatter etymology).

Etymology

オーム / Ōmu (VIZ “Ohm”, aka “Ohmu”) — Oda-CONFIRMED: in the SBS Question Corner appended to Ch. 266 (p. 20), Oda states Ohm is named after “Om” (ॐ / 唵), the sacred Hindu-Buddhist seed-syllable (“I’m not religious, so I winged it”). Om is the primordial sound/mantra at the root of Dharmic invocation — a fitting name for one of Enel’s Priests, whose names all draw on Dharmic concepts: Satori (enlightenment), Gedatsu (解脱 moksha/release), Shura (修羅 the Asura war-realm), and the commander Yama (Enma/Yama, lord of the dead).

Secondary pun (inference, not Oda-stated): the homophone “ohm” (Ω), the SI unit of electrical resistance, lands squarely in this lightning-themed arc (Enel’s Goro Goro no Mi). Ohm is the priest whose iron-cloud (Eisen-Dial) sword literally resists and absorbs attacks (the “Iron Wall” that deflects Zoro’s 108 Pound Phoenix) — a neat fit for “resistance.” This is a thematic layer, not a buried future-reveal. Confidence: high (the Om reading is Oda-SBS-confirmed; the Ω-resistance pun is a secondary inference).