@bimbi12 I don't think so, after all he got a main scenario update for both. Rubia's and Giles (was still locked due to low level). I doubt the scenario would pop up for Rubia, if she were just hiding her strength.
There doesn't seem to be much reason for Giles to create a weak character. Their eye color is also different.
I also doubt she gains strength from those experiments and she already exists and is known by people like the wolf boy. Seems not reasonable to change eye color but not hair color.
@Tangtay
I'm actually surprised he wants to rescue her after 2 years even thought Isaac told him she might not even be the same. Who knows what they did to her. Would be easier for him to die and retry.
Maybe after seeing her in that state later makes him so frustrated he tells Isaac to kill him (and restart, maybe also tell him), rather then continuing seeing her like that.
Then this current scene can be seen as using the possibility to level up tons. He also met another future scenario quest and another important figure regarding the system/his future and/or his own past.
I don't even think he can fail any of those quests, but rather these are guidelines, maybe from his past self, who tinkered with/hacked secretly the 'system' or by someone else (like Ashton). Maybe to know what to do, where he might have failed last time.