Agent 3 (Splatoon)

Agent 3 is the role the player assumes in Octo Valley, assigned by Cap'n Cuttlefish.

Appearance
Agent 3 can have a variety of appearances, depending on the player's choice of gender, skin color, and eye color, as well as their current ink color. They wear the Hero Suit, and can pick up Armor to wear as well. They wield the Hero Shot by default, but can use a Charger or Roller for amiibo challenges.

History
Not much is known about Agent 3's background, except that they are at least 14 years old, since they have complete control over their squid and humanoid forms.

Splatoon
Agent 3 initially went to Inkopolis for an unknown reason, but got swept up in Cap'n Cuttlefish's quest to save the Great Zapfish. In Octo Valley, Agent 3 completes various missions to retrieve stolen Zapfish, defeating many Octarians along the way. Eventually, Agent 3 confronts DJ Octavio, rescuing the Great Zapfish, rescuing Cap'n Cuttlefish and restoring Inkopolis' power supply.

Splatoon 2
In Splatoon 2, the role the player takes in single player has been replaced by Agent 4. Agent 3 was mentioned various times throughout the game through dialogue and Sunken Scroll number 25 reveals Cap'n Cuttlefish went off travelling with Agent 3 for some kind of research trip "at the cape".

Octo Expansion
Agent 3 will return in the upcoming Octo Expansion. Agent 3 is briefly seen in the Octo Expansion trailer, appearing as a green Inkling girl wearing the Splatoon 1 Hero Suit.

Etymology
The name Agent 3 was given by Cap'n Cuttlefish because Agent 1 and Agent 2 are Callie and Marie, respectively. Agent 3's real name is never revealed.

Trivia

 * Agent 3's canonical gender is female, as depicted in the second Sunken Scroll in Splatoon 2 and the Splatoon 2 Octo Expansion trailer.
 * In the manga both Rider and Goggles serve the role as Agent 3.

Splatoon

 * Two sets of Gear identical to Agent 3's outfits can be unlocked for online play.
 * After completing Octo Valley, the player is rewarded the Hero Headset Replica, Hero Jacket Replica, and Hero Runner Replicas.
 * At Levels 25, 30, and 35, Judd will give the player the Armor Helmet Replica, Armor Jacket Replica, and Armor Boot Replicas, respectively.

Splatoon 2

 * The Hero Headset Replica, Hero Jacket Replica, and Hero Runner Replicas are now rewarded by the Callie amiibo, and the Armor Helmet Replica, Armor Jacket Replica, and Armor Boot Replicas are now rewarded by the Marie amiibo.
 * In the English translation of Splatoon 2, Marie remarks to Agent 4 that Agent 3 has fairly poor hygiene. Meanwhile in the Japanese version, Marie states that Agent 4 looks just as good as Agent 3.