Saikyo = Strongest

Yu-Gi-Oh! Duel Monsters Saikyo Card Battle!

Release Date: Summer 2016
Price: Unknown

The red haired character is your protaganist in the game, named “Protaganist”

The rotund kid is Strong Jyuukyuu who uses High ATK monsters

The green haired kid is Psychic Tendou, who as his name implies, uses Psychic-Types

The white haired girl is an altered version of “Tour Guide from the Underworld”, called in the game as “Guide-san” (Ms. Guide), who serves as the general game assist and tutorial character. And it appears she has a Kaiba Corp logo on her hat.

Source: Weekly Shonen Jump