Marinette:

Marinette isn't the best at keeping secrets so you kept it secret till she found out by herself. She felt a bit sad that you didn't trust her with keeping your secret but she also understood it. She was excited that she can now save the city with you.

Ladybug:

She was so happy she had her boyfriend/girlfriend aside her to help her save the city. After saving the city both will go to her house and talk about how that went.

Adrien:

When you tell him he became worried and protective since he didn't want to lose you. He was also excited about being able to work aside you. It was also the moment he told you he was Chat Noir so both told each other things about each other's superhero forms and Kwamis.

Chat Noir:

He was overprotective of you. He trusted you but he just didn't want danger near you. After every fight he would make sure your okay before asking how your fight went.

Alya:

She will turn her ladybug blog into a (Your Superhero Name) blog. She knows how to keep secrets so you didn't hide your identity. She asked so many questions and became besties with your Kwami very quickly.

Nino:

He found out when he saw your Kwami so he asked you about it so you announced you are (Superhero Name). He was so excited. He forgot for a second he was supposed to keep it secret so he almost sent Adrien a text about it but luckily he remembered on time he can't tell anyone. He asked you so many questions and listened to all your stories.

Chloe:

She was ready to expose it to the whole world when you told her so you almost slapped her for her idiocy but luckily didn't. Just scolded her instead so she apologized before saying she will keep it secret. She was extremely jealous at first but it stopped when you came back injured one day so now she is just always worried whenever you go fight and is always calling to ask if you're okay.

Nathaniel:

He will be embarrassed because he drew so many pictures of (Superhero Name) and fanboyed so much about him/her to you. You assured him it was cute so he doesn't need to be embarrassed. After he stopped being embarrassed he fanboyed so much. He asked so many questions and became friends with your Kwami fast. Your Kwami usually sits on his head while he draws your superhero form.

Luka:

He will be very supportive. Whenever you came back from saving the city he would be ready for snacks and some drinks for you. He will be asking you how it went and making sure your not injured.