We Are Nebula! (我ら星雲！ Warera Seiun!) is the ninth episode of Ultraman X.
Wataru's brother, Isamu always looks up on a dream of playing rugby. He was soon visited by a trio of aliens and gradually accepts them but the party were challenged by a group of evil aliens in a rugby match.
Xio members Daichi, Wataru and Asuna are watching a rugby tournament with one of the players is Wataru's brother, Isamu. While Isamu performs well at first but he accidentally hands the ball to the opposing player and made his team lose. After the match, Isamu felt into despair and quits his career as a rugby player, much to Wataru's surprise.
While walking outside, Isamu comes across a rented house and offers a place inside by three residents, office worker Nackley, convenient store worker Icary and craftsman Halky. At night, while they are having dinner, Isamu falls asleep and the three residents reveal their true forms as aliens Valky, Icarus and Nackle respectively. While they are tired from assuming human forms, but at least they glad to find a "kind" human as a housemate.
Meanwhile, Chiaki picks up a recording from a security camera at a warehouse, featuring Alien Babarue, Kemur Man, Dada and Alien Zetton. According to Guruman, they are known as the Dark Star Cluster, an intergalactic crime network. The next day, while Isamu remembered the day where he became a rugby player upon looking up on his brother, the three alien borders finally recognize him as the rugby player that gave up his career. As they accepting him as a friend and willing to counsel his problems, Isamu likewise discovers their true nature but decides to keep quiet after witnessing their kindness over others.
During their snack time, a meteor crashed their house, which turns out to be Halky's pet, Jolly, missing his owner. But the meteor impact made them and Isamu on the run from Xio until Isamu tells Wataru of what really happened. Suddenly, the Dark Star Cluster appear, wanting Halky's Jolly for being a perfect monster weapon. Valky challenges them for a rugby (funny enough, Babarue is a former champion of the Space Rugby League). Seeing Isamu as an equal match, the Dark Star Cluster agree and gives them three days to prepare. Encouraged by his brother, Isamu agrees to teach them while Xio prepares an empty rugby field and for Daichi to guard the Samekujira.
At the day of the tournament, Isamu's team and the Dark Star Cluster play while Isamu's rugby team watch from behind. However, the Dark Star Cluster cheats with their own power until the second half, where Isamu's care for his alien friends spikes his fighting spirit and lead the team to victory. Isamu offers them a handshake but feeling mocked for being treated equals after the game ended, the Dark Star Cluster enlarge and begins on a rampaging spree until Ultraman X appears and use Gomora Oscillatory Wave to send them above the sky.
After the match, Isamu rejoins his team as they head to London.
Daichi's Monster Lab
- Daichi: Daichi's Monster Lab! This time, we're looking at this monster.
- X Devizer: Analyzing, Alien Zarab.
- Daichi: The Alien Zarab is a nefarious alien that had destroyed numerous civilizations.
- X: But not all aliens are bad. There's Alien Valky, Alien Nackle and Alien Icarus. They've given up on invading, and have decided to live in peace.
- Daichi: I hope one day we can befriend other races in space.
- X: Yeah, so do I.
- Daichi and X: We'll, see you next time!
- Daichi Ozora (大空大地 Ōzora Daichi): Kensuke Takahashi (高橋健介 Takahashi Kensuke)
- Asuna Yamase (山瀬アスナ Yamase Asuna): Akane Sakanoue (坂ノ上茜 Sakanōe Akane)
- Wataru Kazama (風間ワタル Kazama Wataru): Yoshihiko Hosoda (細田よしひこ Hosoda Yoshihiko)
- Hayato Kijima (貴島ハヤト Kijima Hayato): Ukyou Matsumoto (松本享恭 Matsumoto Ukyou)
- Mamoru Mikazuki (三日月マモル Mikazuki Mamoru): Hayato Harada (原田隼人 Harada Hayato)
- Rui Takada (高田ルイ Takada Rui): Haruka Momokawa (百川晴香 Momokawa Haruka)
- Takeru Yamagishi (山岸タケル Yamagishi Takeru): TAKERU
- Chiaki Matsudo (松戸チアキ Matsudo Chiaki): Chiaki Seshimo (瀬下千晶 Seshimo Chiaki)
- Sayuri Tachibana (橘さゆり Tachibana Sayuri): Sarara Tsukifune (月船さらら Tsukifune Sarara)
- Shotaro Kamiki (神木正太郎 Kamiki Shōtarō): Yuu Kamio (神尾 佑 Kamio Yū)
- Alien Valky Halky (バルキー星人ハルキ Barukī Seijin Haruki) (Human and voice): Tatsuya Hashimoto (橋本 達也 Hashimoto Tatsuya)
- Alien Icarus Icary (イカルス星人イカリ Ikarusu Seijin Ikari) (Human and voice): Tomokazu Seki (関 智一 Seki Tomokazu)
- Alien Nackle Nackley (ナックル星人ナクリ Nakkuru Seijin Nakuri) (Human and voice): Kunji Hirano (平野 勲人 Hirano Kunji)
- Ultraman X (ウルトラマンエックス Urutoraman Ekkusu): Yuichi Nakamura (中村悠一 Nakamura Yūichi)
- Alien Fanton Guruman (ファントン星人グルマン Fanton Seijin Guruman): Yasunori Matsumoto (松本保典 Matsumoto Yasunori)
- Alien Zetton (ゼットン星人 Zetton Seijin): Yuki Ono (小野 友樹 Ono Yūki)
- Kemur Man (ケムール人 Kemūru Jin): Koichi Toshima (外島孝一 Toshima Kōichi)
- Alien Babarue (ババルウ星人 Babaru Seijin): Kazunori Hitatsuka (直塚和紀 Hitatsuka Kazunori)
- Dada (ダダ Dada): Takahiro Maeda (前田高宏 Maeda Takahiro)
- Ultraman X (ウルトラマンエックス Urutoraman Ekkusu): Sakaekei Iwata (岩田栄慶 Iwata Eikei)
- Alien Fanton Guruman (ファントン星人グルマン Fanton Seijin Guruman): Hiroyuki Fukushima (福島弘之 Fukushima Hiroyuki)
- Alien Icarus Icary (イカルス星人イカリ Ikarusu Seijin Ikari): Daiki Yazaki (矢崎大貴 Yazaki Daiki)
- Alien Valky Halky (バルキー星人ハルキ Barukī Seijin Haruki): Keita Rikimaru (力丸佳大 Rikimaru Yoshihiro)
- Alien Nackle Nackley (ナックル星人ナクリ Nakkuru Seijin Nakuri): Hiroyuki Arai (新井宏幸 Arai Hiroyuki)
- Alien Babarue (ババルウ星人 Babaru Seijin): Hiromu Joko (常光博武 Jōkō Hiromu)
- Dada (ダダ Dada): Kenji Kajikawa (梶川賢司 Kajikawa Kenji)
- Kemur Man (ケムール人 Kemūru Jin): Yoshiki Kuwahara (桑原義樹 Kuwahara Yoshiki)
- Alien Zetton (ゼットン星人 Zetton Seijin): Daisuke Terai (寺井大介 Terai Daisuke)
- Alien Akumania Referee (アクマニヤ星人レフリー Akumaniya Seijin Refurī): Wataru Inaniwa (稲庭 渉 Inaniwa Wataru)
- Alien Fanton Guruman
- Alien Valky Halky (Reintroduced and only appearance)
- Alien Icarus Icary (Reintroduced and only appearance)
- Alien Nackle Nackley (Reintroduced and only appearance)
- Kemur Man (Reintroduced)
- Alien Zetton (Reintroduced and only appearance)
- Alien Babarue (Reintroduced and only appearance)
- Dada (Reintroduced)
- Alien Akumania Referee (Reintroduced and only appearance)
- Samekujira Jolly (baby) (Reintroduced and only appearance)