we can, of course, try each picture separately, or I can post a very obvious sequence...
the following answer fits this riddle better:
feelings
1) sight, hearing, etc.
2) protection/care - something like that
3) Mercedes - in honor of the daughter Mercedes (and the fact that the license plate is white - it's definitely not for sale, but rather it's being searched for/hidden)
4) sadness or something similar
and the 5th picture is the same balalaika
:smile29: