So, since Life, Death, and Shi probably were born at the same time, they all have 3.7 Billion years, but Life only has 10, every 370 million years she grows by 1, then Death, probably 25 years, every 148 years he grows by 1, Shi, idk they might as well be the oldest, probably 40, if that were the case, she would age every 92 million years