To me, and I may think of more later, but it's:
1) Violence and the threat of death are very minor parts of the game, and if you do die, it isn't punishing.
2) You aren't under the gun. Whatever it is you are doing, you can mostly do it at your own pace.
3) The story isn't morbid, grim or sad.
4) The art direction isn't "grimdark".
If what you find relaxing is a hectic PvP battle, then you aren't into cozy games. Some things are just not cozy.
1) Violence and the threat of death are very minor parts of the game, and if you do die, it isn't punishing.
2) You aren't under the gun. Whatever it is you are doing, you can mostly do it at your own pace.
3) The story isn't morbid, grim or sad.
4) The art direction isn't "grimdark".
If what you find relaxing is a hectic PvP battle, then you aren't into cozy games. Some things are just not cozy.