Genshin Impact is a free-to-play RPG that allows you to explore the beautiful world of Teyvat; completing quests, vanquishing enemies, and exploring the secrets of its inhabitants. This is done mostly through the eyes of the Travelers, a pair of separated twin siblings. You’ll play as either Lumine or Aether, and during your journey to find your sibling will encounter many other interesting people that can join your party.
According to google it is around 4 years olf and
In Gaming’s Character Story 1, we learn that he signed on as a guard at the Strongbox Secure Transport Agency just before Lantern Rite. It could lead to a mistaken assumption that it was before this year’s Rite, but if we consider the facts, that is not possible. First of all, the story states that “Lantern Rite was just around the corner at that time”, which means it was a past celebration. In the Vibrant Harriers Aloft in Spring Breeze event we see that Gaming has a wide network of friends and associates in Yilong Wharf, where he started his independent life, and he’s known and trusted as a guard, which couldn’t have happened in a day. Careful reading of his Character Stories suggests that anywhere from a year to a few could’ve passed since Gaming left home.
Gaming is referred to as a “youth” in his Character Stories, and there is no universally, internationally agreed definition of the term. The United Nations places a “youth” at 15-24 yrs. old but this does not have to apply to a story in a fantasy setting.
Gaming’s storyline has markings of a classic coming of age tale, including a conflict with his father over his future career. When leaving home, Gaming was at an age where his father was pressuring him to take over the family business. If we “translate” it to modern terms, it’d place Gaming back then around the age of attending high-school to beginning university, but considering Liyue is based on an earlier age in history, he could’ve been younger. Since he’s been living on his own for a while, we would place him at around 17-21 years old currently.