Oscar holds the position of Guardian of Fire within the Shinchou universe's celestial governance. His elemental domain embodies strength, reflecting his straightforward and dynamic approach.

Previous Angelique OVAs established a romantic history between Oscar and Angelique Limoges before her ascension as queen. Their relationship concluded upon her choosing royal responsibilities over love, shaping a background where he confronts the tension between duty and personal attachment.

In the television series *Koi Suru Tenshi Angelique: Kokoro no Mezameru Toki*, Oscar stands among the nine guardians supporting Ange, the new Etoile. He displays a confident, occasionally playful personality while maintaining deep commitment to his role. He actively guides Ange's growth, exemplified when he escorts her to a village festival. Observing her hesitation, he coaxes her into joining a folk dance, indirectly nurturing her self-expression. He also directly challenges Ange's initial reluctance to embrace her destiny as Etoile, stressing the necessity for her to find her own purpose.

Oscar contributes his Sacrea—the elemental essence of fire—to Ange's critical mission of revitalizing the dying Seijuu galaxy, reinforcing his role as a supportive pillar among the guardians. His mentorship blends directness with an underlying comprehension of emotional struggle, informed by his own past experiences with duty-bound choices.

Oscar's portrayal remains consistent in the sequel series *Kagayaki no Ashita* and other cited media, without significant expansion of his backstory or personal evolution. He continues as a guardian balancing his symbolic association with strength against his established interpersonal dynamics.