The Marble Game: Historia and Ymir

Ymir made a bet with Historia to see who would last long enough to attain 45.6 billion won. Tied together at the hip, Historia would never let Ymir out of her sight and hesitantly agreed.
It's been an extensive journey filled with bloodshed and brutality. Now, they finally have a somewhat peaceful game, but when they team up together to play with some simple marbles, who will reach their end?
SQUID GAME SEASON 1 EPISODE 6 SPOILERS
CW: AOT REFERENCES
(picture doesn't belong to me!)