The note can be found in a green chest among four mannequins with flower vases during the Mannequin Friends random encounter.
I found this memorial thing. Fine. I get it. Boo "hoo". we ALL lost PeoPle ok? How does this helP!!
Every time I find one of these, I will take whatever you sad saps leave behind. Because I am alive and I need it.
The note obtained in this encounter will vary, a selection between five notes will be made (see below).