Maria Ishida

Ishida's young niece who lives with Ishida and his family. Maria is half-Japanese from her mother's side and half-Brazilian from her father's side.

[Spoiler] She gains a constant wonder about the difference between things that are dead and alive after Ishida's fall and fearing he might be dead, Yuzuru takes it upon herself to teach her the difference—being an expert on the matter. [/Spoiler]

(Source: Wikipedia)