Archan is a trickster elf who loves to catch people in traps of her design, like pits. In Pocket Puyo~n, she, like Arle Nadja herself, refers to herself with the masculine pronoun "boku", implying she is a tomboy.
Archan appears in Puyo Puyo~n, where she pranks Arle by tricking her into falling into traps laid by none other than Archan herself, however in Pocket Yo~n she ends up falling into a trap herself.