Hakos will be the flagship of her Gen as much as Gura is the flagship of hers. Mark my words.
She's already reached 100k, the first in her Gen to reach that milestone. Granted the others will reach that milestone later tonight, and I'm over 99.99% certain that at least two of them will reach a million subs before the end of the year, but still.
Although I can't help but question your use of the future tense to describe Hakos' popularity. Notwithstanding the fact that Ceres was the first to be lewded, Hakos has been the flagship of EN Gen 2 from the moment The Internet™ saw her Milim Nava-shaped silhouette.