Ms. Frost

is shopkeeper introduced in Yo-kai Watch, and a Frostina disguised as a human.

She is the owner of the snack bar "Frostia's Place".

Appearances

 * Yo-kai Watch: Befriending Yo-kai
 * Yo-kai Watch 2: NPC Yo-kai
 * Yo-kai Watch 3: NPC Yo-kai

Biology
While disguisedas a human, Ms. Frost appears as a young woman with pale skin, dark blue eyes, and dark brown hair.

Her hair is tied up, and she has bangs done in a similar style to Frostina and Blizzaria.

She wears a blue kimono, with dark blue and white patches on lower edges, a dark magenta obi, and black zōri with white tabi socks.

Her true form looks exactly like any other Frostina.

Ms. Frost is shown to a gentle, understanding personality, listening to the worries of her customers, though of course that could simply be because her job requires her to.

She is also shown to be nice and friendly with any children who happen to come across her shop.

Being a Frostina, Ms. Frost has the power to manipulate ice and snow, and can use these to freeze anything, but does not have full control over them.

It is implied that she has the ability to help people "cool down" if they get very heated and angry, and that she uses this power on her customers.

She is also shown to have the ability to turn into human form, and keep this up for extended periods of time.

Ms. Frost is an unusual Yo-kai, who has been living as a human in Springdale for a long time.

Yo-kai Watch
The player can accept the request "Ms. Frost's Favor" from her, in which she asks them to retrieve Relaxing Herbs from Mount Wildwood.

There they are attacked by a Mad Mountain staking his territory. Before Mad Mountain can hurt them further, a blast of ice ends up knocking him out, allowing the player to retrieve the Herbs. The ice is revealed to have come from a Frostina standing on the bridge further north, who then reveals herself as Ms. Frost, altough Whisper and the player don't notice her.

For fulfilling her request, Ms. Frost gives the player a Frostina Yo-kai Medal, causing them and Whisper to suspect that Ms. Frost is actually a Frostina, but Ms. Frost simply says that the Medal is "something to remember me by".

She also participates in the request "Ultra Hide-and-Seek".

Yo-kai Watch 2
Ms. Frost returns as the shopkeeper of "Frostia's Place" where the player can now buy Snacks.

During the request "Directator's All-Star Cast", Ms. Frost is one of the female actresses that end up being chosen to play a part in Directator's movie. In her case, he seems especially interested in wether she is single or not, but after her answer he quickly changes the topic.

During the request "A Real Charmer" she appears as one of the people Kyubi takes a Kyubi Ball from, with both of them seemingly recognizing one another as fellow disguised Yo-kai.

Yo-kai Watch 3
The player can still buy Snacks from her bar in this game.

During the request she is one of the people who are visited by Lord Enma.

It is revealed that she is acquainted with him, and that she is a Yo-kai who is living as a human in order to protect Springdale, and to connect humans and Yo-kai, alongside Mr. Goodsight and Mr. Barton.

Etymology
"Mama-san" is used in Japan to refer to to a high-ranking woman working at a bar and similar establishments.

"Ms. Frost" is taken from "frost" and possibly "Frostina".

Origin
Ms. Frost is based on the yuki-onna, a youkai typically born from a soul of a woman who froze to death during a snowstorm. (see Frostina).

Specifically she appears to be based on the more friendly portrayal of them them turning into human forms and aiding humans.

Trivia

 * While Frostina is a Yo-kai that can be befriended in any game, the only game where the player can befriend Ms. Frost specifically is the first one.
 * In Japanese, her bar is called, referencing Frostina's Japanese name, and the mythological youkai.
 * In Japan, a "snack bar" refers to a kind of alchohol-serving hostess bar, however, in the Japanese version, Ms. Frost jokes that her bar just has literal snacks.
 * Despite this, it appears that she is still serving alcohol to her adult customers.