Do you know that Record of Grancrest War is written by Ryo Mizuno, the author of Record of Lodoss War? That being said, it won’t be too weird if characters from Record of Lodoss War appear in Record of Grancrest War. And it really happens! Record of Grancrest War footage shows Parn and Deedlit, characters from Record of Lodoss War!
The two will be available through a product code given out as a bonus for first-print copies of the game, so make sure you buy the first-print copies to have them appear in your game!