Curtis is first seen in season 7 as an officer at the Galaxy Garrison, occasionally taking orders from higher ranked officers during the battle. He is also seen involved with the meetings that the paladins and other ranking officers have during this time. Later on in the season when the crew board the Atlas, Curtis is seen as one of the main members on the bridge, being seated to the left of Shiro.
In season 8, Curtis continues his position on the bridge. He is seen taking orders from Shiro, and also was the one to figure out that the paladins were in trouble during the episode "The Grudge".
We also see him in the crowd cheering on Shiro during his arm wrestle. He is the only one to do so, as none of the other Garrison members can be seen and the paladins are elsewhere.
Little is known about the relationship between Shiro and Curtis, but somewhere along the way the two presumably started dating, and then got married a year later once the war was over.
Though it is tough to see his personality from his small role, we get glimpses through his various scenes. He seems to be a quick thinking, smart and someone who can take orders well. He is seen regularly referring to Shiro as "sir" or "captain", meaning he has a level of respect for him.
He also has a softer side, as shown evident during the conversation he has with Acxa and the scenes of him cheering Shiro on in "Clear Day".
- Contrary to popular belief, Curtis has actually been a character since season 7, and has been seen multiple times across the last two seasons. Some believed after watching the series finale that Curtis was a character that had never been seen before, and this is not the case.
- Some viewers believe that the choice to marry together Shiro and Curtis was done in a direct response to the negative impact of Adam's death in season 7, and the subsequent failure of LGBT+ representation in the show.