I'm guessing you aren't referring to the Ku
weight Kitty abandoned by Scootie-Booty in Syria. "Julia" in the Amberverse was someone Amber was in contact with through Facebook and talk/texting during the Casey era. You can see interactions between them on Amber's old Facebook account in the second-half of 2010, with some particularly hilarious and nasty exchanges in the November to December range. It's very clear to infer from the exchanges that Julia was one of Amber's "targets" (like Krystle was), and Amber was in an "online relationship" with her. You can also infer that Amber was using this "relationship" to get money and gifts from her (likely with the ultimate end goal of finding herself a new place to stay). She makes statements during this time which clearly shows that she is only using Casey as a free place to stay while she actively looks for a new host to infect and consume. Amber defends this era as not cheating, but rather being in an "open relationship". Casey denies that they were in an open relationship. If you read through all of the Facebook status posts and the comments, you can actually watch as Julia fades out as a choice, and Amber starts focusing her attention more on Krystle. Julia also gets brought up from time to time because of their age difference. During these exchanges, Amber was 19 and turned 20, while Julia was 16 and turned 17. Amber makes it clear through status posts that she is fully aware of Julia's age.
To my knowledge, Juila has never commented on Gorlworld and avoids it like the plague (though I wouldn't be surprised if she is fully aware of who Amber has become). She's cleanly moved on and is now (based on her Facebook pictures) in a relationship with another woman, and the two raise a child together. Julia looks like a cross between Becky and Destiny (though no "FAS" eyes and far less of a bullfrog neck).
Want to know more?
Always Ymir uploads daily, and has recently been going through all of Amber's old social media. This is probably why "Julia" popped up for you.
Actually, this topic and timeframe resurfaced a hilariously stupid comment from Amber. When talking to Julia in an exchange, Amber says something to the effect of "People believe I'm white, so I let them believe that" and explained she was "non-white" because she was PORTUGEUSE. (Now, white-as-wonder-bread Julia also believed she was "non-white" for having Italian heritage, so yeah they're both retards). It was hilarious to me because it reminded me not only about how desperate she is to be seen as super special and unique (based on immutable characteristics rather than based on merit), but also how much she tries to mirror her partners and how much she "steals" from them.
CASEY ERA:
Identifying as "non-white"; her "coming-out" story; her "anxiety-slash-panic" disorders
KRYSTLE ERA:
Her having "OCD"
BECKY ERA:
Her "depression" era; her BiPolar Diagnosis (which mirrored Eric's Dx)
JADE ERA:
Reinforcement of BiPolar diagnosis; her hair magically becoming "curly" and needing afro de-frizzing products (this was overall my FAVOURITE attempt at assimilation

)
ALEXA (ONLINE):
Switching from BiPolar to a BPD diagnosis; her weaponizing therapy-speak
I didn't really notice new characteristics or "identities" during the Destiny and Emily eras (although behavioural shifts were very noticable). I had chalked up the lack of new changes to how short and unstable these two relationships were. If anyone noticed changes, please correct me.
Last night I had a dream that Amberlynn had lost loads of weight and become too skinny. Then she regained it all again. She also had two young adult sons. It made sense at the time.
I had a dream that Amber got fired from LCU and disappeared completely off the internet. She suddenly appeared back on her channel several month later as a skinny queen. She told us that now she lost all of the weight, she was better than us dispeckful pieces of shit, and that she was going to California to do podcasts with Trisha Paytas. Then she flipped us off, told us to kiss her ass, and jumped out the window to start to her flight to California:
(No I didn't actually have this dream; I lack the impulse control needed to avoid making the flying squirrel joke when it's setup is presented)
In this moment Amber was about to bully her cosplayer for the dark knuckles and the woman said “Amber I’m you, you have dark knuckles” and Amber is like “I’m Portuguese”
I love how you can look at the still image you provided and just predict the words about to come out of Amber's mouth will be to the effect of "I don't have dark knuckles"... while she displays obviously darkened knuckles.
Edit: typos, spelling, and fixing some sentences