Does a Heir again their aspect at some point in their lives? Like say a slave gains freedom and acts like a Heir of Breathe?

Both Heirs and Witches seem to deal with some kind of power play between them and their Aspect- I should note though, it’s not necessarily correct to say they’re going to ‘Gain’ their Aspect, rather, they have to learn to Bear it. If they’re not careful, their very Aspect will consume them. Mituna was Consumed by Doom, Equius was Consumed by Void, and I kinda think John nearly became consumed by his Retcon-y powers, but managed to get a hold on them properly.

Similarly, Damara is Consumed by Time through her Familiar- She becomes a servant of English, and so does the Handmaid. Feferi is Consumed by the Horrorterrors- Which, while Void-y in nature, given the pact she made with them to blow Bubbles where she could change the nature of Paradox Space to allow ghosts to Live there and provide advice, you could say she was Consumed by the Life in the Bubbles. Jadesprite is, in a way, consumed by Space- Her isolation from her Friends, the change of Setting, but Jade does manage to overcome this. She does mention being sort of almost scared about her powers at times and not being used to being nigh-omnipotent, she just doesn’t know what to do with her control over Space, but in the end she gets her answer and simply tries to have fun and be herself with her dogs.

So yes, Heirs will gain their Aspect at one point, say they will ‘inherit’ it if you want. But that moment is not the end of the Heir’s journey, that’s nothing more than the beginning, and they will have to be careful not to allow their Aspect to overcome them.