remark on (someone or something)
To express a comment or observation about someone or something. Lacking anything more interesting to say, I remarked awkwardly on my date's clothes. The boss remarked on the new interns to me, noting how efficient and fastidious they have been.
remark (up)on someone or something
to comment on someone or something. (Upon is formal and less commonly used than on.) She remarked upon his tardiness and then continued the lesson. There is no need to remark on me or anything I do or don't do.