Why Il-nam refused to take the umbrella shape
Players had to choose among four forms – a circle, a triangle, a star, and an umbrella – before knowing what they would do with them in preparation for the deadly tournament’s second game.
Il-nam, on the other hand, did know what they would play, and despite his “generous” consent to allow Gi-hun to choose first, he refused to take his umbrella in place of the star since everyone understands that the umbrella is the most difficult shape to get.