ZUN

ZUN is a Japanese game developer mostly known for creating the Touhou series. He is a competitor in the King for a Day Tournaments. He was selected as a popular fan submission by combining all votes for Touhou characters, and was #6 overall in the ballot.

Rips
Touhou is a common source for ripping on the SiIvaGunner channel, with multiple songs appearing as frequently ripped tracks or minor memes, such as "Bad Apple!!", "Beloved Tomboyish Girl", "U.N. Owen Was Her?", and "Flowering Night", as well as "Hate not the Wind, Spring Blossoms ~ Eternal Wind" from the Touhou fangame "Touhou: Book of Star Mythology".

King for a Day Tournament
ZUN was the ninth competitor revealed on July 20, 2018. His source list included rips from the Touhou series, as well as other games he has worked on.

ZUN defeated Pitbull in Match 4 of Round 1, but lost to Unregistered HyperCam 2 in Match 2 of Round 2.

Quotes
Lines without a link come from the "All Victory Fanfares and VS Lines!" video.

King for Another Day Tournament
"With his imperishable love for alcohol, and his influences on his sleeve (along with the rest of his shirt), ZUN is ready to re-enter the tournament! He’s the embodiment of bullet heck with music that spans across the entire bullet hell genre. Anybody who crosses his path better be prepared for a carousel of agony!"

- ZUN's description on the MOJO!! ZUN returns in the King for Another Day Tournament. He has a new color scheme, and also has a Reimu doll in his pocket. His source list has been expanded to include Touhou fan music and all bullet hell games.

ZUN faced off against Quote and won in Round 1, but lost to Law & Disorder in Round 2. He faced off against Mariya Takeuchi in Round 2 of the Loser's Bracket but lost and got eliminated.

Quotes
Lines without a link come from the "All Vs/Victory Lines" video.

Trivia

 * A Reimu Fumo appears in ZUN's pocket single, a type of small plushies known for their expensive prices and their well-known presence in the Touhou community. It was added in reference to Munchie in Eight's pocket on the  render of Hero.
 * ZUN's jacket is based off danmaku patterns from multiple games such as Ikaruga as a way of representing all of bullet-hell games, not just Touhou.
 * Suika Ibuki's sake bottle can be found with ZUN in both his King for a Day and King for Another Day portraits.
 * On the geometry of ZUN's portrait, the shape of an apple can be found, alluding to the song "Bad Apple!!"
 * Three trumpets can also be found in the geometry, referencing ZUN's high usage of the Romantic Trumpet preset (or "ZUNpet" (ＺＵＮペット) as many fans nickname it) in his music.
 * Clicking on ZUN's artwork in his character bio plays a soundbite from "SKULL TRUMPET", another reference to the abundance of trumpets in his music.

King for a Day

 * His victory quote against Unregistered Hypercam 2 and Solid Snake references the Focus Button.
 * His victory quote against Dancing Alien Team directly names Touhou 12: Unidentified Fantastic Object.
 * His vs. quote against Thanos references Marisa B, a shot type for Marisa Kirisame in Touhou 10: Mountain of Faith. This shot type is infamous for being bugged to deal more damage to targets than intended.
 * His quotes against Geno reference Alice Margatroid.

King for Another Day

 * A large sum of ZUN's quotes include references to the Touhou Project including its characters, music, and other references.
 * His vs. quote includes ZUN mistaking Metal Ajit Pai for Hisoutensoku, a large orange robot featured in Touhou 12.3: Hisoutensoku.
 * His victory quote against Geno mentions lillies-of-the-valley, a highly poisonous woodland plant that is found in the Nameless Hill where Medicine Melancholy is battled on.
 * His quotes against Off the Hook ft. Paruko make reference of the Prismriver Sisters, as well as reference the dead fourth sister Layla Prismriver.
 * His victory quote against "Weird Al" Yankovic mentions Sakuya Izayoi, who ZUN thinks would get along well with the two. This references the relation between Sakuya and Dio Brando, two characters that can utilize the manipulation of time and knife-wielding abilities.
 * His vs. quote against Pitbull and the Aliens is a reference to Mai Teireida and Satono Nishida's theme "Crazy Backup Dancers".
 * His vs. quote against Nintendo Power reference the startup text of Touhou games, "Girls are now preparing, please wait warmly and have some tea".
 * His vs. quote against Men in Black is a play on Nue Houjuu's theme "Heian Alien".
 * His victory quote against Men in Black is a direct reference to Mamizou Futatsuiwa's Last Word from Touhou 14.5: Urban Legend in Limbo and Touhou 15.5: Antinomy of Common Flowers, a spell card in which she dresses up as an MiB and erases the opponent's memory.
 * His quotes against Thanos reference Yukari Yakumo, a character that wears clothes and has a shikigami.
 * His vs. quote against Wario Partners, LLP reference the Yorigami Sisters Shion and Joon, referred to as the "Worst, Most Disastrous Pair".
 * His victory quote against Wario Partners, LLP reference Gold Rush, a one-stage danmaku game where the player (as Seija Kijin) gathers as much gold as they can in under a few minutes.
 * His vs. quote against King Dedede mention Yuyuko Saigouji, known to many for being a gluttonous eater.
 * His victory quotes against King Dedede reference the wooden mochi-mashing mallets rabbits such as Seiran wield.
 * His victory quote against Solid Snake references Reimu Hakurei, the main protagonist of the Touhou series known for trying to convince others to donate to her shrine.
 * His vs. quote against DJ Professor K reference Murasa Minamitsu, the victim of a drowning accident who became a spirit after her death.
 * His victory quote against Quote mention Subterranean Animism, the 11th installment to the main Touhou Project game lineup. The game's setting takes place in the Underworld.
 * His vs. quote against Adam Levine alludes to the Scarlet sisters Remilia and Flandre, as well as the Scarlet Mist Incident.
 * His victory quote against Adam Levine references Marisa Kirisame's signature spell card "Love-Colored Master Spark" while reciting the chorus of Maroon 5's "This Love".
 * His victory quote against Johnny Bravo and vs. quote against Jack Bros. references the ice fairy character Cirno.
 * His vs. quote against Jack Bros. also references the butterfly youkai Eternity Larva.
 * His vs. quote against Mariya Takeuchi references the song "Plastic Mind", Alice Margatroid's theme from Mystic Square.
 * His victory quote against Mariya Takeuchi mentions Moriya, which can reference either the Moriya Shrine, a shrine dedicated to Shintoism, or Suwako Moriya, the original god of the shrine.
 * His victory quote against Dr. Robotnik references SnapCube's Real-Time Fandub of Sonic Adventure 2 where Eggman uses his super laser piss to blow up the moon. A reference to the moon rabbits and Lunarians are also made, as they are residents of the moon.
 * His vs. quote against Daft Punk ft. Pharrell reference the character Hata no Kokoro, who relies on using her masks to represent her emotions to others, as her face is emotionless.
 * His victory quote against Daft Punk ft. Pharrell reference the character Tewi Inaba, the leader of many youkai rabbits who is known as the "Rabbit of Good Fortune" to humans, for the good luck she brought them. A reference to Daft Punk's "Get Lucky" is also made here.
 * His quotes against Dr. Piccolo reference Marisa Kirisame's interactions with Rumia in Stage 1 of Touhou 6: Embodiment of Scarlet Devil.
 * His victory quote against Jack Bros. references the Digital Devil Story: Megami Tensei II song "Explorer", which in itself references how Utsuho Reiuji's theme "Nuclear Fusion" and Yumemi's theme "Strawberry Crisis" is inspired by this song.
 * His vs. quote against HOBaRT mentions tsukumogami, a type of youkai that originally are ordinary tool or objects until they gain sentience on the 100th anniversary of their creation.
 * His victory quote against HOBaRT alludes to the Kappa, a type of youkai that live inand can manipulate water, are fond of cucumbers, and their strong technological abilities.
 * His victory quote against Donkey Kong references the character Ibaraki Kasen, the protagonist of Wild and Horned Hermit and a Sage of Gensokyo who can communicate and summon with animals.
 * His vs. quote against MissingNo. mentions enenra, a type of youkai that is a spirit composed of smoke that resides in bonfires or rises out of houses, and can only be seen by the pure-hearted.
 * His victory quote against MissingNo. references the third unused protagonist of Touhou 6: Embodiment of Scarlet Devil, Rin Satsuki. She was cut due to time restraints.
 * His vs. quote against The Jazz Cats mentions Rin "Orin" Kaenbyou, Satori's cat-like pet that carries corpses to the Hell of Blazing Fires to regulate the heat.
 * His victory quote against Eminem uses a direct line from Marisa Kirisame in Stage 4 of Touhou 8 Imperishable Night 's fan-translation that included the use of strong language.
 * His quotes against Law & Disorder directly reference Eiki Shiki, Yamaxanadu, a Yama who judges the dead and decide whether they go to Heaven, Hell, the Netherworld, or get reincarnated.
 * His vs. quote against "Weird Al" Yankovic references the mention of him as well as his song "Eat It" in the final episode of Stardust Crusaders.
 * His victory quote against Nintendo Power reference the idea and fan wishes of Reimu Hakurei appearing in Super Smash Bros. Ultimate.
 * His vs. quote against Johnny Bravo references a fake interview by Animemaru that includes ZUN remarking that "nobody in Gensokyo is gay", but the line has been altered to have the opposite meaning.
 * His vs. quote against Mr. Krabs references the popular sea shanty "Drunken Sailor".
 * His vs. quote against Dr. Robotnik references the "MONTH FIRST" series, a collection of YTPMVs by Philiponbread that includes Team Fortress 2 sources over Touhou music.
 * His victory quote against Papyrus is an old reference to Undertale fans complaining about Undertale being a hard game because of its bullet-hell elements in its battle system, to which Touhou fans jokingly remarked on the situation given that some Touhou games are known for their notoriously insane difficulty in the bullet hell genre.
 * His vs. quote against Nico Nico references the popularity of Touhou on Nico Nico Douga, usually its frequent use in IOSYS parodies.
 * His victory quote against Nico Nico mentions "⑨ Coarse Tea (⑨番茶)" and "Van Houten brownies", the drinks and sweets featured in "Alice and Marisa's Cookie Kiss", a popular Nico Nico Douga meme and MAD source.
 * His vs. quote against Donkey Kong references the title of the Donkey Kong Country cartoon episode "Watch the Skies".