Write a brief overall summary explaining who your character is, what type of person they are - should be detailed enough that others can look to this when sending shippers etc.
Platonic relationships info - write a brief description of your character in relation to making friends. For example, do they have trouble forming friendships? Are they a social butterfly? Do they keep their circle tight? Are they more of a loner? etc.
Antagonistic relationships info - write a brief description of your character in relation to making enemies. For instance, what type of people would grate on their nerves? Do they have any rivals? Are they prone to petty office drama? Is it simply not possible for them to have enemies, because they're so likeable? etc.
Romantic relationships info - Write a brief description of your character in terms of romantic relationships. Are they in one - if so what's it like? Do they have any interest in being in one? Are they in love with love, or just testing the waters? Hopelessly crushing from afar? Or have they sworn off romantic relationships entirely? etc.