Harmony as Aptitude

You improve at reducing the friction between social relations.

The Way It Serves

How one may find themselves using Harmony to manifest what they find ideal.

Matching others' energy or emotional affect.
Bringing people together.
Creating spaces for others to interact.
Smoothing out awkward conversations.
Diffusing tension within groups.
Inviting others to speak.

And if these are traits you can't help but to do even since childhood, and most importantly, produces a form of joy, it's safe to say that it's an aptitude you possess.