Raiatt appears solely in the Lupin III television special "Seven Days Rhapsody". He is a former mercenary partner of Daisuke Jigen, sharing a violent and morally ambiguous past where trust was vital for survival, forging a complex bond. Raiatt approaches Jigen under the guise of reconciliation, specifically requesting help to steal a secret weapon from Colonel Guz Kyuick's security firm, MIX. He leverages their shared history and past partnership to frame the job as both a professional opportunity and a chance to mend their relationship, appealing to Jigen's loyalty.

Raiatt's true allegiance lies with Colonel Kyuick and MIX. He betrays Jigen during the operation, facilitating his capture and imprisonment as part of Kyuick's larger scheme, revealing his willingness to manipulate former allies. After Jigen is rescued by Lupin III, Raiatt confronts them. He makes a final attempt to manipulate Jigen by invoking guilt and their past connection, questioning if Jigen can truly abandon their shared history. Jigen responds with a definitive and terse rejection, ending their conflict.

Visually, Raiatt is an adult male depicted with a handsome and clever appearance, his design conveying sophistication and experience befitting his manipulative role from Jigen's past. His character role and presence are confined to the events of "Seven Days Rhapsody".