Cassiopeia

Cassiopeia, also known as ESUB-69 was born and raised in a lab alongside her siblings, they were selected and bred as part of an evolution expirment. While she escaped the facility as an eevee, Cassi was already genetically coded to evolve into Espeon and Umbreon, which later factored into her evolution into Eclipseon during a solar eclipse.

Cassiopeia is a somewhat vain and self centered pokemon, she believes herself to be superior to most other pokemon, especially other expiriments at the lab she was raised in. She holds the scientists who raised her in high regards, despite what they did to her siblings and herself, she beleives that they truly loved her even though she was just another test subject in their eyes. Despite publically sporting an ego bigger than a wailmer, evolving took a huge toll on her self esteem. She has become increasingly insecure about her body, and faith, she struggles to trust others and tends to hide her insecurity behind sassy and rude remarks.