Agent Sean was, with Agent Luxury, one of the first Bad Slash agents named, first appearing in the fourth mission in the Original Series, "Protector of the Ringbearer." His main activities in the PPC appear to have been keeping the nymphomaniacal Lux occupied. Before the end of the Original Series, they had apparently broken up, and were no longer partnered. After this, he did not seem to appear again for a long time.
In 2019 HST, Sean unexpectedly returned to Headquarters, claiming to have spent the past few years in a plothole in the Lord of the Rings continuum, and was immediately sent on a mission with rookie agents May and Melissa Hurley.
Sean has blue hair and multiple piercings, and is a notorious tinker.