Grammar: First Character Of Proper Noun Not Capitalized

[sylv256]

Expected: “The fabric community is in an uproar due to the removal of the beloved emote :modfest_1_14:. The community says they can not believe that they removed the emote just because of Julian (German Branch) to the dismay of the AOF US server.”
Reality:

[MariaTheDinkus]

While Julian is a proper noun, I'm fairly certain this capitalization was chosen as that's how their username is capitalized as well. Because of that, I'm not sure this is something that needs fixed, but if anyone has further input please do tell.