Mikoto

Maria, or Temple Maiden Maria, is a recurring character from the anime. She is the guardian of the Snowpoint Temple.

She first appeared in A Pyramiding Rage! where she welcomed Brandon right after his arrival. She and Samuel left to investigate the Snowpoint Temple and then later warns Brandon that Pokémon Hunter J has attacked the Temple. Maria and Brandon asked her not to disturb Regigigas, which resides in the Temple, but J ignored their warnings, causing damage to the Temple. Afterward, when J had retreated and Regigigas had gone back to sleep, Maria prepared to rebuild the temple back to its former glory.

(Source: Bulbapedia)