Blue

In Friendstale, Swap!Sans is a role taken by DerpyBlueberrySans.

Personality
Swap!Sans (her Friendstale name being Blue) is rather rough around the edges. When first meeting someone Blue is either incredibly quiet or very outspoken, and this generally scares people off. If someone makes her angry (whether is being directed at her of someone she cares about), she holds onto that anger and expresses it in physical ways (usually breaking things). However, once she really gets to know someone she's a very nice person, despite her looks and actions. Blue is also very insecure.

Appearance
Blue in Friendstale appears wearing a black T-shirt, black jeans with a chain hanging near the waist, and a black-blueish scarf is wrapped around her neck. She usually has a piece of sour candy in her mouth, and if she doesn't she's constantly searching for one.

Lucario The Skeleton
Blue and Lucario are good friends that are close. Even though the two don't see each other much, since the two live in different areas, when the two have time to spend, they spend it talking to each other. The two are also in The Big Trio.

Max(Sans)
Blue and Max get along very well, however it is pointed out by Blue to "not get on his bad side." meaning she probably knows Max is capable of abilities unlike most of the cast.

Jamie(Papyrus)
Unlike how she is with Max, Blue dislikes Jamie as she finds him more annoying, yet claims that he has a cute voice.

Sakura
Sakura and Blue are close friends that know each other well. As well is Saku a member of The Big Trio, which will take involvement in the story later in time.