As indicated by his codename, Ypsilon is the second Perfect Soldier, having been &quot;born&quot; after Proto-One. She was with Ypsilon during his awakening in the underground sections of the former Red Shoulder base on Melkia. She gave him his name, and he formed an immediate attachment to her as would a child to its mother. She first attempted to teach him gentleness, but his pre-programmed killing nature emerged despite this, much to be pleasure of Albert Killy and the other masters of the Secret Society.    Under the later tutelage of Borough and Prince Kanjelman in Kummen, Ypsilon matures as a warrior. His genetically-engineered combat skills are honed to perfection, and unlike Proto-One, he remains fiercely loyal to his commanding officers.    Emotionally, however, Ypsilon is still very much a child. Arrogant and egocentric, he sees himself as the ultimate in human evolution. From his first encounter with Chirico Cuvie, Ypsilon becomes obsessed with killing him, convinced that Chirico has poisoned the mind of Proto-One ... and only his death will end her &quot;confusion&quot; about whom she really loves. This obsession increases from one bloody battle to another throughout Kummen and all the way to their final showdown on Sunsa.

A century of bloodshed between warring star systems has plunged nearly 200 worlds into the flames of war. Now, an uneasy truce has settled across the Astragius Galaxy... 
Chirico Cuvie, a special forces powered-armor pilot is suddenly transferred into a unit engaged in a secret and highly illegal mission to steal military secrets - from their own military! Now he's on the run...from his own army! 
Unsure of his loyalties and to cover their own tracks, Chirico is left behind to die in space. Surviving by luck, the renegade is now hunted by both the conspirators and military intelligence. 
He is driven by the haunting image of a mysterious and beautiful woman - the objective of their mission, and his sole clue to unraveling their treacherous scheme. But the conspirators will do anything to preserve their mysterious agenda... 
(Source: AnimeNfo)

Released in 1985, this OVA tells a critical part of the story between the TV show's Uoodo and Kummen arcs. Although the TV series covered the Red Shoulders in some detail, we didn't get to see much of Chirico's time there or the people involved, and we get both of those here. 
(Source: mahq.net)