when you [plural] see him/her/them [obviative]
when we (but not you) see him/her/them [obviative]
when we (you and I) see him/her/them [obviative]
when s/he or they [obviative] see you [plural]
when s/he or they [obviative] see us (but not you)
when s/he or they [obviative] see us (you and me)