Ace Killer (エースキラー Ēsu Kirā), is a robotic assassin and a major antagonist in Ultraman Ace. He served as the main antagonist of the two part episode "Execution! The Five Ultra Brothers" and "The Five Stars That Scattered Throughout the Galaxy", the main antagonist of the forty-third episode of Ultraman Mebius titled "Threatening Mebius-Killer", a major antagonist in Ultraman Mebius Gaiden: Ghost Rebirth, a supporting antagonist in Ultraman Zero Gaiden: Killer the Beatstar, a minor character in Ultraman Ginga, and a supporting antagonist in Ultra Fight Victory. It is a Choju created by Yapool specifically to counter and kill Ace.

Ace Killer returns in Ultraman Mebius, where he is used by Yapool to battle Mebius.

Biography

Ultraman Ace

Ace Killer was created by Yapool to kill Ultraman Ace. After Ace Killer obtained the powers and weapons of the Ultra Brothersr, Yapool released a robot replica of Ultraman Ace to demonstrate Ace Killer's power by having Ace Killer destroy it.

Ultraman Ace attempted to rescue his brothers, but he was ambushed by the powered-up Ace Killer. Ace Killer easily overpowered Ultraman Ace with the Ultra Brothers' powers, but the Ultra Brothers used the last of their energy to empower Ultraman Ace. With the combined energy of his brothers, Ultraman Ace used a Space Q attack to destroy Ace Killer, freeing his fellow Ultras.

Ultraman Mebius

Ace Killer later returned when it was used by Yapool to combat Ultraman Mebius.

Yapool summoned Ace Killer to Earth to battle Mebius. Ace Killer easily had the upper hand in the fight, and things only got worse for Mebius when Yapool had Gadiba merge into Ace Killer to transform him into Mebius Killer. Mebius Killer brutally beat down Mebius. However, some encouragement from Aya gave Mebius the courage he needed to overpower and defeat Mebius Killer, destroying the robot with the Mebium Dynamite move.

Ultraman Mebius Gaiden: Ghost Reverse

After Yapool was revived, he used Ace Killer as a host.

Ultra Fight Victory

Yapool later used Ace Killer again, giving him a copy of Ultraman Victory's UITrans and declaring him Victory Killer. Ace Killer was sent to prevent Ultraman Ace from saving Ginga. Victory Killer was later destroyed by Victory himself and Shepardon.

Navigation

           Ultraman English.png Villains

Main Villains
Absolute Tartarus | Alien Benzen | Alien Empera | Alien Garut | Alien Rayblood | Alien Zagon | Celebro | Chaos Header | Commander Black | Dark Lugiel | Dark Zagi | Demon King Jackal | Exceller | Gatanozoa | Grakyess | Greeza | Gudis | Heller | Juda | Jugglus Juggler | Maga-Orochi | Mensch Heit | Radical Destruction Bringer | Reugosite | Sphire | Ultra Dark-Killer | Ultraman Belial | Ultraman Tregear | Yapool

Secondary / Recurring Villains
Ace Killer | Alien Babarue | Alien Baltan | Alien Bat | Alien Guts | Alien Magma | Alien Mefilas | Alien Metron | Alien Nackle | Alien Nowar | Alien Pedan | Alien Temperor | Alien Sran | Alien Valky | Alien Zamu | Alien Zarab | Antlar | Bader Tribe | Cicada Human | Dark Mephisto | Darklops Zero | Bemstar | Black King | Deathrem | Delos | Destrudos | Doragory | Eleking | Etelgar | Galberos | Gan Q | Golza | Gina | Gomora | Grand King | Grozam | Gudon | Kei Fukuide | Kemur | Kodalar and Kilazee | Kyrieloid | Lunaticks | Melba | Mold | Nonmalt | Nova | Red King | Reibotas | Roygard | Sadola | Saki Mitsurugi | Telesdon | Tyrant | Ultraman Orb Dark | Vakishim | Verokron | Zetton (Zett) | Zogu

Minor / Movie Villains
Alien Baladon | Alien Barossa | Alien Bat | Alien Gapiya | Alien Godola | Alien Hipporito | Alien Icarus | Alien Keel | Alien Markind | Alien Mijir | Alien Monera | Alien Nuaza | Alien Salome | Alien Shamer | Alien Shaplay | Alien Tarla | Armored Darkness | Bakubarba | Beast the One | Beatstar | Bemular | Bezelb (Queen Bezelb) | Biranki | Bizorm | Black Silhouette | Bogar | Chaosroid | Chaos Ultraman | C.O.V. | Dark Faust | Dark Giants (Camearra | Darramb | Hudra) | Dark Mephisto (Zwei) | Dark Lucifer | Darkgone | Deathfacer | Delacion | Dogyuh | Doctor Psychi | Evil Tiga | Ezmael | Gakuzom | Gamos | Gargorgon | Giranbo | Gillvalis | Gomess (S) | Guar | Iaron | Inpelaizer | Jamila | Jasyuline | King Myra | King of Mons | Luganoger | Megaflash | Metal Organisms (Apatee | Algyuros | Meemos) | Menjura | Mezard | Murnau | Nature Control Machines (Tenkai | Enzan | Shinryoku) | Peginera | Phantom Ultraman Agul | Roberuga | Robot Chief | Sandros | Shinigami/Zebub | Snake Darkness | Waroga | Zaigorg | Zamsher | Zoiger

ULTRAMAN Manga / Anime Villains
Ace Killer | Adad | Alien Adacic | Alien Bris | Alien Igaru Pigmon | Alien Kadder | Alien Nepenthes | Alien Pedan | Alien Robuton | Alien Woovelve | Ambassador Mephisto | Bemular | Black King | Leo Brothers | Valky

Humans
Gondo Kihachi | Hiroya Narumi | Kaji | Mai Yuki | Mitsuhiko Hirukawa | Norberg | Professor Otomo | Yoichiro Matsunaga | Yuuji Tango

Organizations
Ace Killer Squad | Alien Union | Belial Army | Belial Galactic Empire | Black Buster Corps | Dark Giants | Darkness Five | Empera Army | Four Heavenly Kings | Guar Army | Heller Empire | Interstellar Alliance | League of Darkness | Planet Invasion Union | Reionics Hunter | Star Cluster Council | Star of Darkness | The Kingdom | Villain Guild

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