In the anime Lazarus, the character known as HQ operates within the world of high-stakes criminal enterprise as a broker or intermediary for assassination contracts. Information about HQ emerges in the series when a military intelligence officer named Schneider seeks to eliminate the protagonist team. To accomplish this, Schneider contacts HQ for the purpose of hiring a notoriously lethal assassin known as the Twin Dragons.

HQ is characterized by a businesslike and demanding negotiation style. When approached to facilitate the assassination, HQ does not agree to the terms lightly but instead demands an outrageously high payment for the assassin's services. To prove that the cost is justified, HQ arranges a live demonstration of the Twin Dragons' capabilities, during which the assassin single-handedly and effortlessly annihilates an entire unit of special forces soldiers. This calculated move underscores HQ's pragmatic nature and reputation as a reliable but costly broker who deals with only the most effective assets in the criminal underworld.

Some analysis of the series suggests a deeper, more ambiguous layer to the character. There is speculation that the identities of HQ and the Twin Dragons are not separate entities but are in fact the same person. This theory posits that the two personas could represent different personalities or dissociative identities within a single individual. The fact that other characters in the story have never seen these two figures in the same room together, with their interactions supposedly being conducted through written messages, lends some weight to this interpretation of a fractured or concealed identity. If this theory holds true, HQ would not simply be a middleman but the assassin directly orchestrating the contract, taking on a separate persona to negotiate with clients. The confirmation of this dual identity and its implications for the character's role in the series remains a point of interest based on the unfolding events of the anime.