Arven is an upperclassman at Naranja Academy who actively explores the Paldea region, particularly mountainous areas like Glaseado Mountain. During one independent excursion, he encounters significant danger when pursued by an agitated Cetitan. Ohara resolves this situation, intervening to calm the wild Pokémon with her flute after recalling Cetitan's responsiveness to certain sounds.

This incident underscores his established background as the child of a prominent Pokémon researcher, though the series leaves this specific familial connection unexplored. His presence in the wilderness aligns with his affinity for outdoor exploration and ingredient gathering. In a conversation with Ohara, he inquires about her relationship with her parents, reflecting a connection to his own background involving complex parental relationships.

His role primarily involves brief interactions with the main trio of students. He participates in the academy's Treasure Hunt, an independent study period encouraging exploration. Beyond the mountain encounter and the parental inquiry, his actions and development receive no further detail across the series' episodes.