Vivi Yukino[1] is the leader and the sole female member of the Mystery Skulls. She is also the former sweetheart of Lewis. Her character can be described as a cross between Daphne and Velma from the American animated television series Scooby-Doo.


Vivi stands slightly shorter than Arthur and has a petite build with very light skin. She has blue hair with bangs, sides and back being off the shoulder and held back with a darker blue headband.

She typically wears a long scarf and a blue, puffy sweater with a short skirt. She has short heeled Mary Jane shoes with thigh-high stockings. All of which are either a lighter or darker tone.

Everything on Vivi is blue aside from her eyeglass lenses, which are a striking shade of magenta. This is likely an homage to her amnesia proceeding the incident within The Cavern, though this has yet to be confirmed.


Vivi is very enthusiastic about the paranormal investigations that she and her friends have. She is brave and courageous, not only does the haunted mansion make her happy, but she throws herself in between Arthur and Lewis, ready to take a hit to protect her friend. She cares deeply about her friends and worries for the well-being of others, seeing as she does not allow Chloe to participate in the investigations due to her age. She appears to be a somewhat lazy person as she spends most of "Freaking Out" and the first half of "Hellbent" asleep and looking irritated when people wake her up.



Arthur is Vivi's friend and a member of her team. They seem to be good friends who care about one another to the point where Vivi will protect him at the cost of her own safety. Arthur was the one who dragged Vivi away from Lewis and pushed her into the van to make a hasty escape.


Vivi is the owner of her pet dog, Mystery. They are also part of the same team and seem to be getting along splendidly. If what is true about kitsune in Japanese mythology applies to Mystery, then he is most likely very loyal and protective of her. It's unclear whether Vivi is aware of Mystery's true form or whether she believes him to be an actual dog.


Lewis was part of Vivi's paranormal investigation team before his death. The two of them were dating, much to Arthur's dismay. They seemed to have been very happy together. When Lewis died, Vivi was there to see it happen when she took the lower path in the Cavern. However, it appears that she lost any memories not only of that night but also of him so when they meet again after his death she has no recollection of who he is. Lewis still has feelings for her after his death, he stops in his tracks trying to kill Arthur when Vivi is in the way and his wrath driven behavior ceases immediately. When she is forced to leave him, his heart breaks.


Duet is Vivi's boss at her "actual" job. Being a rather mysterious person, Vivi has failed to find out too much about them.


Another person at Vivi's workplace is Chloe. Vivi has thus far refused to let Chloe join the Mystery Skulls due to her age and reasoning. Whether it is because of this or something more, Chloe does not appear to like Vivi. The two of them get along, though, probably for the sake of work.[2]

Mr., Mrs., and Grandma Yukino

Vivi's father, mother, and grandmother, respectively.[1] Vivi's father and grandmother are from Japan, and her mother is American. Little is known about her relationship with them as details have not been given, but it is heavily implied she was strongly influenced by her mother and grandmother, bearing significant visual personality traits from both women.

Mushi the Ancestor

A sword wielding warrior ancestor from ancient Japan. How she's connected to Vivi outside of being blood related is currently a mystery. Vivi however has shown that she might have the same powers that Mushi has (see Abilities).


Ice Powers: Vivi has shown that she might be capable of tapping into Mushi's power or spirit by the glow of her bat being very similar to the glow of Mushi's enchanted sword. Whether this is a conscious thing Vivi can do or if she is even aware of her ancestor or her power is not clear at the moment. It's also possible that she straight up has the same powers as Mushi, and/or that it's something that runs in the family. However, it's unknown whether or not the Yukino family are aware of any of them having this power or it existing at all. It is also unknown whether or not the power is contained within Vivi herself or in the bat.



Vivi's Profile on Mystery Ben's blog.

  • According to Mystery Ben's Blog, Vivi's design is inspired by several different sources.[3] Her hair and scarf designs are influenced by Yoko Littner and her outfit is a combination of Velma Dinkley And Daphne Blake's outfits. Her color scheme is inspired by Vinyl Scratch and Mega Man.  She may also be inspired by Nefeltari Vivi from One Piece, whom she shares a name and hair color with.
  • Vivi is japanese on her father's side.[4][1]
  • Vivi's blood type is B. According to blood type personality theory, people with blood type B are thought to be passionate, active, creative, animal-loving, flexible, cheerful, friendly, optimistic and vocal about their personalities; but also irresponsible, forgetful, selfish, lazy, impatient, unreliable and "going own way."
  • Vivi's flower that appears on Shiromori is a blue orchid.[5] Blue Orchids often represent love, rarity, beauty, and strength.
  • Her instrument is the Guitar.
  • The baseball bat that Vivi uses to fend off Shiromori in "Hellbent" has a kanai anzen on the handle, visible after the bat is knocked from her grasp. A kanai anzen is a Shinto omamori talisman bearing the kanji 家内安全, which literally means "please keep my family from harm."  Interestingly, the talisman is not visible immediately before she grabs the bat to fend off Shiromori.


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