I don’t headcanon very much. I kind of assume everyone is aro as a default. But one headcanon I have is of Jim Evers from The Haunted Mansion as a loveless aroallo. He definitely pours himself more into his work and isn’t really affectionate or loving with his wife. It feels like he uses being away at work all the time to avoid the expectation that he might have to be romantic, and stays in the relationship largely for sex. He cares for his wife deeply, as we see later in the movie when he literally risks his own life for hers. But I never really read their relationship as romantic.