Yami Jaden implies he is the darker, more sinister version of himself, which I would argue is more Supreme King than Yubel/Jaden.
Likely Adult Jaden or something along those lines.
Awakened Jaden would be better since possession makes it sound like he isn't in control which is false whereas awakened would make more sense as he remembers he is the reincarnate of the supreme king
Anoymous
KazumaKS