Akari Tsukumo

Yuma's older sister, Akari can be a tad self-centered at times, occasionally sending others out to find her scoops to make reports on, even if it is dangerous or hazardous. She can also be somewhat aggressive, showing to be willing to physically attack Yuma when she caught him dueling (though it is possible she was just trying to intimidate him). Despite this, Akari genuinely cares for her little brother, and is rather protective of him.

(Source: Wikia)