Shen operates as a merchant trading in diverse wares, including slaves, reflecting a morally ambiguous profession. He first encounters Tsukasa Jinguji in a squid village and subsequently accompanies him. Though posing as a merchant, Shen wields additional capabilities like assassination techniques, indicating skills beyond his trade. He possesses a discerning eye for well-trained physiques and demonstrates marked interest in Jinguji.

Revealed as an intelligence officer serving a kingdom, Shen's actions and dialogue imply divided or hidden loyalties beyond this allegiance. His introduction involves kidnapping and sacrificing Telolilo—an act he later expresses partial remorse for, though it minimally impacts his portrayal. Shen openly voices attraction toward Jinguji, eliciting visible discomfort during their interactions.

His quantified attributes include Power (30), Speed (60), Intelligence (43), and Luck (12). At level 52, his merchant occupation conceals skills such as Negotiation (Lv1), Presence Concealment (Lv2), Assassination Technique (Lv2), passive Perseverance, Eye of Beauty (Lv1), and Appreciation of the Human Body (Lv1). Shen’s presence complicates group dynamics, functioning as a supporting figure with undefined allegiances centered on his interactions with Jinguji.