Everyone should head over and start reading the updates to "The Key Points". 

Every Immortal has an awakened state, but you must discuss it over PM with me.

Every Awakened state is unique, and slightly monstrous. They are also all black, but can have single color (power related) details. You will see this when you read about Evelina's awakened state. 

An Immortal can go their entire life without ever knowing about their spark, or achieving an awakened state. So it is technically not a requirement. 

There are a few more key points. Feel free to ask my any questions so I can update the FAQ :)