- "How about Agent? Are you scare?" - Season 2 episode 11 (MISSION: HOPE)
- 'Seis' means 'six' in Spanish.
- He's a silent-type and serious agent unlike his other twin Siete who is noisy and annoying.
- He and Siete had a similar design to Marie and Callie a characters who are also twins and also one of the characters in the video game ''Splatoon''.