Zangetsu is one of the Eblan Four in Final Fantasy IV: The After Years, and is known as Zangetsu of Thunder. He is an elderly man with aspirations of becoming a shinobi, despite being a late bloomer, and admires Edge, who looks young enough to be his son, as his master.
Zangetsu is one of the characters Edge talks to before heading to the Cave of Eblan. He is seen guarding the entrance to Eblan if the player, when in control of Edge, goes outside the cave and heads back to the castle.
When Eblan receives word of Baron stealing Crystals from other nations, the Eblan Four become eager to assist Edge, and are sent on missions to gather information. Zangetsu disguises himself as a dwarf to freely roam King Giott's castle, and after confirming the Dark Crystal is still safe and the Tower of Babil is reactivated, he returns to the surface via a secret tunnel near the castle.
After the mission is completed, Zangetsu returns to Eblan by walking across the sea. He reunites with Edge and the other Eblan Four within the Tower of Babil and after being forced to escape from the Mysterious Girl and Ifrit they fall to the Underworld and into the Falcon.
In the Gathering Tale, Zangetsu watches over Porom and the other incapacitated characters below the deck of Falcon. During the ending, he is seen as a dwarf as Luca upgrades the Falcon. Zangetsu and the other Ninja Guard of Eblan renew their vows of loyalty to Edge awaiting for their next mission.
Zangetsu is effective for both physical and magical combat, though he is limited to Lightning-elemental Ninjutsu attacks.
Zangetsu is above average in offensive stats, with decent Strength and Speed. His HP is greater than the mage characters but not on-par with other physical attackers. His largest asset is his very high Intelligence, which surpasses Leonora's and almost equals Golbez's.
Zangetsu's abilities are Ninjutsu and Human Kite, which functions identically to Jump. He is best equipped with spears for this reason, as like Jump, Human Kite does increased damage when the user is equipped with a spear. Zangetsu can perform Band abilities with the other Eblan ninjas, as well as Luca due to his time undercover at the Dwarves' Castle.
||15||Attack all enemies with a super-powered kite.|
||12||Cast Haste on all party members.|
|Gale Twin Break||
||14||Attack all enemies from above.|
|Wheel of Elements||
||15||Attack all enemies with fire, ice, lightning and wind.|
|Ultimate Art: Advent of the Phoenix||
||20||Create a flaming phoenix to damage all enemies equivalent to lost HP of party.|
Zangetsu is fought as a boss, along with the remaining Eblan Four, at the beginning of Edge's Tale, as part of a training session.
Zangetsu appears in the Final Fantasy Trading Card Game.
Like the other Eblan Four, Zangetsu's name is related to the moon.Zangetsu means "morning moon" in Japanese.
- Zangetsu is the only member of the Eblan Four to lack an exclusive Ninjutsu skill.