I love this. It makes so much sense. Sirius is described of paying attention to no one but his close group at school. He seems to open up one-on-one (with Harry and Remus). I can’t see him being a teacher, for example. And, Remus is always noticing how others feel and reaching out to do something about it (or frequently, anyway.) Note the number of times in the books he tells someone else that something isn’t their fault.

(Oops, wrong log in first time!)