Gustaf

is a Rank A Rare Yo-kai of the Eerie tribe.

He is considered a member of the Bundory Family, being their butler.

Appearances

 * Yo-kai Watch Busters 2: Playable Yo-kai

Biology
Gustaf is a Skeleton Yo-kai.

Two yellow lights acting as eyes can be seen inside of his eye sockets, from which tears are constantly flowing. His head is completely detached from his body, with a light yellow wisp emerging from his neck instead.

He wears a black top hat with a red hat band, and on top of that, he carries around a pink cup and tea pot.

His body wears a black tuxedo with long coat tails, a red bow tie, and white gloves.

Gustaf is shown to be a very hard-working butler, who does everything he can to serve the Bundory Family, caring greatly about each member. He is also very emotional, often crying because of how moved he is, due to the children's growth.

In the past, Gustaf was already the butler of Catleen, back when she was still a human princess, with him presumably having been human, too. Even after the king released the Yo-kai Kanaendesu and destroyed the kingdom, Gustaf continued to serve Catleen, aiding her in her quest to stop the tragedy from repeating itself.

Yo-kai Watch Busters 2
Gustaf appears in the game, aiding the Bundory Family as they fight with the Busters over the treasures of Karakuri Island.

His first appearance is during Chapter 2, where the Bundory Family steals their wind-up key that is required to enter a new dungeon, commenting on Dandory's interpretation of Gowin's pun.

He is seen again during Chapter 9, looking for the rest of the family, before being found by the Busters and Tanto. He ends up explaining Catleen's past to them, and asks the Busters to help looking for the other family members.

Etymology
"Gustaf" is derived from the onomatopoeia and possibly.