Fives, nicknamed for his designation of CT-27-5555—simplified to CT-5555 and later redesignated as ARC-5555, was a clone trooper and later ARC Trooper who was well known for being the second longest surviving member of Domino Squad. During his cadet training, in which he received his nickname due to his designation, he and his squad members were considered inferior and barely made it past initiation. However, after their victory at both the Rishi outpost and Third Battle of Kamino, it was not a long before he and Echo were promoted from cadet to ARC Trooper status in the 501st Legion. Under this status, he participated in many stealth incursions, such as missions on Lola Sayuand Umbara.

From the start, Fives demonstrated a strong ability to empathize and care for his fellow clones.

He should sound like Dee Bradley Baker, who voiced all of the clone troopers in Star Wars: The Clone Wars.