Daniel (MyStreet)/Affiliation

Aphmau
When Aphmau was doubting her role as Alpha, Daniel and the others had stepped in to help her. When Ein showed up, Daniel was wary of him, showing general concern for Aphmau. When Mr. Gavin said that Aph may have her Alpha position taken away, Daniel showed a lot of concern for Aphmau, hoping she would be okay.

They have a close relationship shown in minigames, where Daniel wanted to stop Ein from "marking her". Daniel also volunteered to be Aphmau's "little brother". After that, they showed a close sibling-like bond.

Ein
At first, Daniel was very wary of Ein, because of his Omega title. Eventually, he and the others eventually trusted Ein because Aphmau did. After he was chosen to be Omega, he had a hard time trusting Ein.

Dottie and Rylan
They are always seen as a trio together. If something happens to one of them, the others try to defend them. When Daniel was chosen to be Omega, Dottie and Rylan tried to step in to be Omega, as they say that Daniel can't fight, but it was too late.