Warstar, a combination of two symbiotically linked mechanoid aliens of B'nee and C'cll, was a member of the Imperial Guard.
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History
As a member of the Borderers division of the Guard, he was tasked with enforcing the Shi'ar law to assist the governors of worlds conquered by the Shi'ar.
He was active in the Imperial Guard as far back as the trial of the Phoenix (at that time impersonating Jean Grey) during which Warstar fought against the X-Men to decide Phoenix's fate.
Later, Warstar was a conspirator involved in overthrowing Majestrix Lilandra. He was an agent of Lord Samedar, Deathbird and the Brood. Warstar battled the other Guardsmen on behalf of Deathbird. He was later still serving on the Imperial Guard, which then obeyed the commands of Deathbird