Maria Hase possesses short blue hair and cyan eyes, presenting a quiet presence who often observes her baseball team from afar. She occasionally interacts with fellow member Ayaka Nakano, though the substance of these exchanges remains unspecified. Her background reveals a transition from literary pursuits to baseball, driven by admiration for the story's protagonist despite her initial focus on literature. Her name integrates layered meanings: "Maria" derives from Japanese characters signifying hemp/flax (麻), village (里), and peace/quiet (安), while "Hase" originates from characters meaning first/new (初) and swift current (瀬).