Mario has a fun, teasing, and exaggerated style of communication, atypical of a traditional coach. While she struggled to get along with her former students at Meijo Crown FSC, her personality meshed well with Ryoka Miketa. Mario also enjoys coming up with nicknames for her students.
The surname "Nachi" consists of the kanji 那 (phonetic) and 智 ("wisdom"/"intellect").
The given name "Mario" consists of the kanji 鞠 ("ball") and 緒 ("string"/"beginning").
Mario's old surname, "Akane" (赤根), consists of the kanji 赤 ("red") and 根 ("root"/"foundation"). It also refers to akaneko (赤猫, "orange cat"), an animal reference.