Satsuki Yumizuka

Yumizuka Satsuki (弓塚 さつき), also known as "Sacchin" (her nickname, a contraction of "Satsuki-chan") is an important side character in Tsukihime and Melty Blood (from Re-ACT onwards). Her character image song, as stated in Geccha, is T'EN VA PAS, performed by Harada Tomoyo.

Role
Satsuki is Tohno Shiki's classmate and friend, and likes him very much. She plays somewhat different roles in the game and the anime. In the game, she is shy and has somewhat of an inferiority complex. She has a crush on Shiki, although he is completely oblivious of this and regards her as just another classmate. She is later attacked by Roa while walking at night and infected with vampirism. In several of Tsukihime's routes, Shiki is forced to kill her. In the anime, she is portrayed as somewhat more outgoing and a mutual friend of both Shiki and Inui Arihiko, and confesses to Shiki near the end of the series. It is news of Yumizuka's supposed death during Nero Chaos's raid on the hotel that finally prompts Shiki to action against the vampire. TYPE-MOON had originally planned for her to be a heroine in the story, as explained in the Tsukihime PLUS-DISC story Geccha and alluded to several times in Kagetsu Tohya.

In Melty Blood ReAct, she appears in the arcade mode, and is a playable character. The scenario suggest that she did indeed become a vampire, but Shiki did not kill her. Nasu mentionned in a doujin anthology about Ciel (月の彼方、永遠の眼鏡 TYPE-MOON作品集) that Melty Blood was written using the events after the "Satsuki Normal End", whereas the manga version of Melty Blood suggests that Shiki did indeed kill her. She seems to have become good friends with fellow tragic vampire Sion.

Abilities
Satsuki's exact status remains a mystery, but she quickly advances in rank as a vampire, going directly from human to being a Dead Apostle. She has a Reality Marble, Depletion Garden (枯渇庭園), which rapidly decreases the mana of the area where the Reality Marble is expanded. It is similar to Tohno Akiha's Plundering ability, but drains and dissipates the mana in the environment rather than absorbing the prana of a single target. It is extremely effective against Magi who need mana to attack or elemental that require it in order to exist, but it has no actual effect on creatures that are cut off from the world, such as humans who don't survive on mana. This is uncommon even for powerful vampires and would rank her close to the Dead Apostle Ancestors. These facts seem to suggest she had an extremely high magical potential to begin with, but the exact details are unknown. She is considered somewhat of a gag character after the story of Tsukihime, with incessant jokes made about her cruel fate, her lack of background information and a scenario, and her inability to be with Shiki, exemplified by the quote "Isn't it sad Sacchin?"