Overview:

The eighth and most private planet.

About:

Age as a Planet: 4.5 billion years
Age as a Human: Late 20's
Designated Color: Blue (000,000,255)
Gender: Masculine Nonbinary
Pronouns: He/They
Sexuality: Demisexual (Doesn't feel attracted to anyone unless he forms a strong emotional connection with them.)

Personality

Neptune comes off as very stoic and uncaring to others due to their reserved nature. He is unlikely to step out of line, and when he does it is about something important to them. They deeply trust very few people, and they open up to even fewer people. Caring comes inherently to Neptune, as they are very empathetic even though they don't show it much.
Neptune struggles relating to others and having others understand them.
He really hates conflict.
Has a big ego admittedly.