Tag name
Well I don’t think it will happen due to the TOS being broken.
You’d have to contact support to change anything like that, but since you’re using someone else’s account, they’d probably be less than willing to do anything (sharing accounts violates the ToS). Unfortunately, they don’t usually change account names except for situations where the name could reveal personal information (real name, for example) or for very particular situations.
as others have said this would break the toss rules . . but if the grand parent is still alive maybe they could do this for you . so it would not break the toss rules. good luck
Only the owner of the account may request a display name change and it will only be changed if the display name gives away personal information or breaks ToS. Since this isn’t the case for you, you’ll have to stay with Gruntsgt
ANet may give it to you.
Its not what you’re gonna be known as ingame. Character name always take priority since thats the first thing people see and you can change that with gemstore item.
Well either that or just wait a couple of years, join the army and become a sergeant.
This is neither here nor there, but I can’t help but be impressed that your grandfather is a gamer. Props to him.