The Gundam Wiki
The Gundam Wiki

Christina Sierra (クリスティナ・シエラ Kurisutina Shiera?) is a character that appears in the anime Mobile Suit Gundam 00.

Personality & Character

She's into fashion, enjoys exploration, programming, and tries to get friends involved in her activities. She's an honest person and bluntly tells her feelings to people. Due to bad experiences, she doesn't like to recall her past to people. She's also an idealist about changing the world and lookout for those in her life.

Skills & Abilities

Christina is a talented hacker/programmer. She's capable of hacking and infiltrating into highly secured government servers and extract data without being discovered. As part of Celestial Being, she uses her hacking abilities to help extract information to help CB in their missions. She also uses her programming abilities to aid CB, such as creating the stand-alone OS system for the Meisters when Veda was hacked. Christina also doubles as the CIC communications officer to the Gundam Meisters during missions. She's able to track all their movements and advise the Meisters as the conditions of the mission(s) change.


Early Days

Not much is known about Christina's past. The only thing known is that she formally lived in an un-identified space colony with her mother. For unspecified reasons, she left her mother and was eventually recruited by Celestial Being for her programming/hacking talents. It's unknown when did she exactly join CB, but it's guessed that she was with them at least 2 years as the Gundam Meisters gathered and prepared for tactical training; it suggests that Christina was also involved with the training as she became a CIC/AIC operator for the Ptolemy and the Meisters.

World Armed Intervention Campaign

As Celestial Being began operations on the day of the AEU-09 AEU Enact's debut and the HRL/HRA's 10th Anniversary Ceremony, Christina would the give further instructions for the following missions through the use of gathered data based on terror networks and military operations.

HRL Gundam Capture Operation

When the HRL/HRA planned to capture at least 1-2 Gundams, by distracting Tieria and Allelujah with empty ships, an unmanned ship flew to the Ptolemaios, was destroyed by Dynames/Lockon, and the remaining pieces hit Ptolemy because Christina failed to react.

Trap in Taklamakan Desert

Christina sent mission plans to the Meisters to stop a group of terrorist from destroying a Uranium facility in the Taklamakan Desert.

Trinity Armed Intervention Campaign

After meeting the Trinity's, Christina developed a lustful attraction the Johann Trinity, using a picture of him and herself as a screen saver. Shortly after the Meister fought the Trinity's, Christina removed/deleted the picture.

Operation Fallen Angels

As Operation Fallen Angels commenced, Christina was saddened by Lockon's death. Afterwords, her and the other crew members broke the oath of secrecy.


Christina before dying

In episode 24, UN Forces and Alejandro Corner attacked the Ptolemaios. The other Gundams were preoccupied engaging enemy units, and the ship was damaged. When the situation looked bad, Christina lied to Feldt to protect her. Shortly after, a GN-X shot and severely damaged the bridge, while Lichtendahl Tsery shielded her from the blast. Chris realized what Lichty had done and told Lichty she was blind not to appreciate a great guy like him, Lichty was glad to hear, but died shortly. Chris hugged Lichty's body and told Feldt to take care of herself. Feldt didn't understand why Chris sounded so morbid, but it's revealed a large shard of shrapnel pierced Chris's back and her space suit was compromised. She was dying from internal bleeding and coughing up blood. Chris begged the others to change the world, at which point the bridge exploded, vaporizing Lichtendahl and herself.


Celestial Being

Main article: Celestial Being

Christina, like all the other members of Celestial Being was approved by Veda. She often ran missions and programs through Veda. Without Veda's approval, no operations can be allowed. After the recent discovery that Veda was tampered with. Chris created an independent OS system for the Gundam Meister's to use with their Gundams.
Crew of the Ptolemaios
Feldt Grace
Christina is always trying to get Feldt to be involved in her activities like shopping and trying out clothes; she's been resistant if not disinterested in Christina's interests. She's aware of her feelings for Lockon, but never said anything about it. She conveyed her dying message to Feldt, telling her to take care of herself and to change the world.
Sumeragi Lee Noriega
As tactical commander of the Ptolemy, she takes all her orders from Sumeragi. Even though she has a subordinate relationship with her, Sumeragi is relatively lax with her. At times Chris would remind Sumeragi about her bad drinking habits at inappropriate times.
Lichtendahl Tsery
Lichty has always been interested in Christina and tries to do things for her to impress her, but she said he wasn't her type. He was jealous when she showed interest in Johann Trinity. When Lichty shielded Chris from the GN-X's rifle blast, he was badly injured. Chris admitted to him that she was blinded and that she couldn't notice a great guy like him. He was happy that Chris liked him back; unfortunately he died soon after. Chris was saddened and holds onto Lichty's body and both were vaporized when the Ptolemy exploded.
Lasse Aeon
Nothing in depth developed between them besides a friendly/professional relationship on board the Ptolemy. Only in their final moments before the Ptolemy was attacked did they actually get to partially bond before the Ptolemy's destruction.
Ian Vashti
She has the least developed relationship with the two. While friendly and professional, they don't seem to have a real friendship and only have a professional one.
Gundam Meisters
Although familiar with all the Gundam Meister's, Chris doesn't have much personal communication with them unless it's mission-related. She did however once cover for Setsuna's unannounced use of Exia. Other than that she doesn't seem to have a strong bond with them versus her relationships with the crew of the Ptolemy.
Team Trinity
During Team Trinity's visit on the Ptolemy, Christine got her picture taken with Johann Trinity, which she shows to Lichtendahl and Lasse.


Sierra never went into detail about her mother, only that she lived in a space colony and that her bad experiences led her to run away. When Celestial Being recruited her, she never communicated with her mom again until recently before her death. It's speculated that she either had a poor relationship with her mother or some sort of complicated history involving her mother that convinced her to run. Her mom will never know about Christina's sudden death as Celestial Being's code of secrecy prevents the knowledge and whereabouts of each member.



Information is currently being retrieved from the backend.