An alien group named Villain Guild, has planted a Monster Bomb in the city. A help request was then brought in to E.G.I.S. from External Affairs Division X.
A new request was brought in from the Foreign Affairs X Division, an organization inside police specialized in alien-related crime, to E.G.I.S.
An alien group Villain Guild has planted a "Monster Bomb" in the city. Homare who recognized the mastermind, headed to the criminal group by himself. What is the relationship between Homare and the mastermind? There is not much time left until the activation of the Monster Bomb! The last hero of the Tri-Squad appears!
Who Is the Leader? (リーダーは誰だ Rīdā wa Dareda)
The Tri-Squad, now reunited, bicker over who the leader of the group is, due to Titas claiming to be the leader because he's the eldest, Taiga retorts by saying he is the leader because they all wear the Taiga Spark on their right arm. Fuma wants to rename his item the Fuma Spark and Titas the Muscle Spark. They then compare their planets of origin as well as the previous Ultra Warriors who came from their respective home planets, with U40 getting the short end of the stick just like in real life.
- Hiroyuki Kudo (工藤ヒロユキ Kudō Hiroyuki): Yuki Inoue (井上 祐貴 Inoue Yūki)
- Homare Soya (宗谷ホマレ Sōya Homare): Ryotaro (諒太郎 Ryōtarō)
- Pirika Asahikawa (旭川ピリカ Asahikawa Pirika): Ayuri Yoshinaga (吉永 アユリ Yoshinaga Ayuri)
- Kana Sasaki (佐々木カナ Sasaki Kana): Chiharu Niyama (新山 千春 Nīyama Chiharu)
- Kirisaki (霧崎 ): Kou Nanase (七瀬 公 Nanase Kō)
- Inspector Sakura (佐倉警部 Sakura-keibu): Shingo Kazami (風見 しんご Kazami Shingo)
- Volk (ヴォルク Voruku): Ryo Tachibana (橘 りょう Tachibana Ryō)
- Zolin: Shigeru Harihara (針原 滋 Harihara Shigeru)
- Hippie Man: Makoto Takahashi (高橋 麻琴 Takahashi Makoto)
- Park Mother:
- Girl in the Park:
- Ultraman Taiga (ウルトラマンタイガ Urutoraman Taiga): Takuma Terashima (寺島 拓篤 Terashima Takuma)
- Ultraman Titas (ウルトラマンタイタス Urutoraman Taitasu): Satoshi Hino (日野 聡 Hino Satoshi)
- Ultraman Fuma (ウルトラマンフーマ Urutoraman Fūma): Shota Hayama (葉山 翔太 Hayama Shōta)
- Ultraman Tregear (ウルトラマントレギア Urutoraman Toregia): Yuma Uchida (内田 雄馬 Uchida Yuma)
- Ultraman Taiga: Hideyoshi Iwata (岩田 栄慶 Iwata Hideyoshi)
- Ultraman Fuma: Satoru Okabe (岡部 暁 Okabe Satoru)
- Ultraman Tregear: Shinnosuke Ishikawa (石川 真之介 Ishikawa Shinnosuke)
- Homare Soya
- Pirika Asahikawa
- Deavorick (MB)
- Alien Fanton
- Alien Zetton Zolin
- Garmes Man
- Alien Serpent
- Alien Pedan
- When Deavorick was blasted, its gun arm can still be seen, blended in explosion dust. This is most likely an overlooked error.