Figarland Shamrock serves as the commander of the God's Knights and is a World Noble from the Figarland Family, being the son of Saint Figarland Garling, one of the Five Elders of the World Government. He is also the older twin brother of Shanks, one of the Four Emperors. Shamrock is tall and has a lean, muscular build, with long hair styled into a small braid on the left side of his head and a hint of facial stubble. His striking resemblance to Shanks often leads others to mistake him for his twin, although he lacks the triple scars over his left eye and retains both arms.
In keeping with his status as a World Noble and a God's Knight, Shamrock wears an opulent military tailcoat fastened with frog closures, complemented by light trousers adorned with dark straps on the left thigh, dark gloves, thigh-high metallic boots, and a cravat wrapped around his neck. He carries a saber at his left hip, secured by a shoulder belt, and often drapes himself in a black cloak when on the move.
As the commander of the God's Knights, Shamrock's authority is second only to that of the Supreme Commander Garling. It can be inferred that he possesses combat skills, as the organization has a history of engaging in various incidents. Like his fellow God's Knights, he has jurisdiction over standard World Nobles and functions as a law enforcement figure among them. Shamrock has the ability to utilize Magic Circles for transportation, having arrived in Elbaph alongside Gunko through one. His powerful Haki manifested as a massive burst resembling black lightning upon his arrival in Elbaph, which was noted by Scopper Gaban as being highly abnormal. Additionally, Shamrock wields a saber that has gained the powers of an Awakened Mythical Zoan-type Cerberus Devil Fruit, allowing the blade to transform into a three-headed dog that can unleash blades from its mouths. Even Loki, known for his immense strength among giants, feared the threat of the blades.
During the banquet celebrating the Straw Hat Pirates in Elbaph, Shamrock and Gunko arrived at Aurust Castle via a Magic Circle. When they inquired about Loki's whereabouts from a pair of giant guards, their seriousness was dismissed, prompting Gunko to resort to torture for the information. The duo then ventured into the Underworld to meet with Loki, offering him a position within the God's Knights, which he declined. Frustrated by Loki's demeanor, Gunko attacked one of his pets, and Shamrock suggested using it as leverage. However, Loki remained unyielding even after enduring a severe beating from Gunko, much to Shamrock's annoyance. Once Loki was knocked unconscious, Shamrock deemed him no longer worth their time and instructed Gunko to contact Mary Geoise to bring Elbaph under the control of the World Government. Before they could leave, however, Loki regained his composure and questioned Shamrock about his striking resemblance to Shanks. Although Gunko attempted to deflect the inquiry, Shamrock explained that he and Shanks were twin brothers, surprising Loki. This revelation led Loki to issue a threat, provoking Shamrock's outrage. In response, he summoned Cerberus from his sword, which horrified Loki. As Shamrock commanded Cerberus to attack the giant prince, he and Gunko made their escape on a bird-like creature formed from arrows. Loki was left severely wounded by Cerberus while Shamrock and Gunko plotted to take Elbaph's children hostage as leverage against their parents. Recognizing that they would need additional support, Shamrock ordered Gunko to contact someone else at Mary Geoise.
Eventually, Shamrock and Gunko returned to Elbaph's Sun World, allowing Gunko to create a Magic Circle to summon reinforcements. Rimoshifu Killingham and Shepherd Sommers emerged through the Abyss, although both appeared unprepared for the mission, humorously acting as if they had just arrived in Elbaph. Once they gathered their bearings, Shamrock expressed confusion about why he had received two God's Knights instead of the one he had requested. Killingham explained that Shamrock had been recalled to Mary Geoise due to a "dire" situation that had arisen since the Levely. After briefing his companions on the plan to extract the giant children, Shamrock proposed making a "game" out of the task, as they would have to manually kidnap the children using ships, given their inability to utilize the Magic Circle.
Trivia
- A shamrock is a type of three-leaved clover associated with good luck and Ireland.
- His name may reference famous wrestlers, specifically the Shamrock Brothers—Ken Shamrock and Frank Shamrock.
- Unlike other World Nobles, Shamrock's name does not include the "Saint" honorific.
- In his debut during the Levely Arc, Shamrock was implied to be Shanks due to sharing the same voice actor, and Shanks himself appeared earlier in the episode, with the voice credits only referring to Shanks to keep Shamrock's identity concealed.