She might or might not be Helba, it kinda depends on your own personal point of view, but i can assure you that this is DEFINETLY NOT any kind of concrete proof to say she's Helba:
AnubisGem wrote:At the end of .hack//GIFT she becomes Helba
.Hack//GIFT is a parody, which doesn't follow the original story at all, and the events of it doesn't have any important significance to the actual story. It's non-canon, and you could say, an "alternate timeline" at best. So you shouldn't believe that such woman is Helba just because it says so in GIFT...unless of course, you also want to consider THIS as a serious and real fact:
Yep, that's .Hack//GIFT. And yes...that's Balmung. lol
And as a bit of a helpful advice:
There's a discussion of this through youtube comments
Unless the YouTube comment comes from someone such like "MasterZED", "EtherealDeath", or "SorrowKun" (...nah, forget about SorrowKun, he's such a moron. lol), i wouldn't take ANY of the comments involved in .Hack discussions seriously. To say this in the nicest way i can...YT users have such a great "infamy" when it comes to discussions about .Hack, and tend to be wrong about 90% of the time.