Mail Whale

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Mail Whale is recurring character in Undertale Yellow. As an employee of UGPS, he is assigned a task of delivering mail throughout the Underground and shipping others from one location to another.

Profile[edit | edit source]

Appearance[edit | edit source]

Mail Whale is a monster resembling a pink whale with a white underbelly and small white feathery wings. He wears a blue mailman cap on his head and a bag on his flipper.

Personality[edit | edit source]

Mail Whale acts enthusiastic about the mail when he is on the job. When Clover talks to him on break in the Wild East, he acts more casual but still says he loves his job.

Main Story[edit | edit source]

A UGPS station sign in Snowdin.

When Clover interacts with a UGPS station, Mail Whale descends from above and gives them mail (provided he has any to offer). Later on in the game, in the Sunnyside Farm in Dunes, Mail Whale will reveal that Clover can also interact with UGPS stations for Fast Travel. This allows access to previously visited locations that have UGPS stations.

Neutral Route[edit | edit source]

Mail Whale appears at the Steamworks Control Station UGPS sign with a letter from Martlet, giving it to Clover immediately without calling as she had paid a premium fee for priority mail. If a Pacifist or Genocide Route is aborted in the Steamworks, Mail Whale instead does this right after The Furnace.

Genocide Route[edit | edit source]

While Mail Whale greets Clover in their initial encounter, he stops appearing altogether once the Snowdin kill count is exhausted. This also means Clover can not return to previous areas, as they cannot Fast Travel.

Trivia[edit | edit source]

  • Mail Whale rhymes whenever encountered at a UGPS station. At the Wild East Saloon, it is revealed to be company policy.
  • While he is never referred to by third-person pronouns in the game, multiple developer materials use he/him pronouns for Mail Whale.[1]
  • If Clover aborts the Genocide Route by not killing all the robots in the Steamworks before fighting Axis, Mail Whale will appear to give them Martlet's letter in The Furnace, but the UGPS station will still not be usable to pick up new mail or to use Fast Travel.
  • Mail Whale was first (briefly) shown in the Snowdin trailer, and was officially revealed in the May 2018 Devlog, on Gamejolt.[2]

Gallery[edit | edit source]

References[edit | edit source]

  1. A whale ready to do his job - Game Jolt
  2. You’ll be able to receive your mail at a designated UGPS station, scattered around the Underground. A lovely character by the name of Mail Whale will swoop down and deliver the goods whenever the bell is rung. - Game Jolt
  3. The Undertale Yellow Art Book is here! Featuring nearly 300 pages of concept art, screenshots, commentary, and more 💛 - @3le2pm2q3is2s on Bluesky, December 24, 2024.