Denim

Denim (セイラ・マス Seira Masu) is a minor character from Mobile Suit Gundam and the Mobile Suit Gundam: The Origin OVA series.

Mobile Suit Gundam: The Origin
During the One Year War he served under Char Aznable on the Falmer, where he piloted a Zaku II distinguished by three stars on the left side of its head and is seen fighting alongside Char.

Mobile Suit Gundam
Under Char Aznable, Denim was placed in charge of a recon mission to Side 7 with his subordinates Slender and Gene to spy on an Earth Federation base that was transporting a new type of mobile suit. When Gene decided to disobey orders and start attacking the base, Denim had no choice but to back him up. When Amuro Ray gets into the cockpit of the RX-78-2 Gundam and critically damages Gene's Zaku, Denim orders Gene to retreat with Slender, until Amuro cleaves and destroys the retreating Zaku. Denim, enraged by the rookie's death, makes one final rush at the Gundam. Amuro, desperate not to explode the incoming Zaku's engine and fatally damage Side 7, runs the Gundam's Beam Saber through the cockpit of the Zaku, stopping it dead in its tracks and instantly incinerating Denim inside.

Mobile Suit Gundam Unicorn
17 years after Denim's death, an old Zaku II remains on display at Industrial 7 in the first episode of Mobile Suit Gundam Unicorn is most likely Denim's. The Zaku on display has a large hole in its left side that suggests heat-based damage, which matches where and how Denim's Zaku was hit.

Mobile Suit SD Gundam
While Denim doesn't show up directly, the SD Zaku II known as Three of the Zaku trio that infiltrates Side 7 during the first episode is loosely based off of him and plays the same role as Denim in this parody retelling of the original Mobile Suit Gundam story. Similar to Denim, Three shows the most caution of the trio and shows a sign of leadership among the three. Three perishes alongside Two and One when Amuro Ray's Gundam shoots a hole in the colony and the trio gets sucked into space.