HE’S A WHAT (minor spoilers for the first like 5 minutes of his story quest)
HE’S A FUCKING MINOR?! Not just a minor but THIRTEEN?!
Before you suggest they retconned Diluc’s age, the quest directly addresses Diluc’s departure from the KoF and states it happened when he became of age—so 18. Which we already knew. Kaeya then got promoted to Diluc’s spot almost immediately afterwards, meaning he got it at 17 maximum (he’s described as Diluc’s younger brother in the Chinese dub, but they’re also regularly mentioned to be close than age, leading me to presume Diluc’s just a few months older than Kaeya as his birthday falls before Kaeya’s anyway). Meaning that regardless as to whether the manga was retconned, Diluc still had to be at minimum 16-17 to have set a record.
I will never look at this crazy little dude the same way again.