A shrine has been created to an "angel" and "child of Ivybridge", close to the spot where he was stabbed to death on an Isleworth estate.
Dozens of bunches of flowers, candles and moving tributes now mark the spot in Summerwood Road, Isleworth, close to where he died.
One message describes him as a "great friend and godfather", and says: "Thank you for the memories. They were great. I'll tell you about when I see you again!X"
Another recalls how they used to "chill and have a few and crack jokes" together.
'You did not deserve to go like this'
"You were always humble and straight forward and did not deserve to go like this", adds the friend, who concludes "I am sure (you will) watch over us like the angel you were".
Among the flowers and candles lies an unopened can of Old Jamaica Pineapple Soda, presumably one of his favourite drinks.
Friends and family of Mr Roy had previously paid tribute on Facebook and Twitter, with one pal describing him as a "friendly giant" .
There were calls for better CCTV and more police on the estate at a community meeting held in the wake of his death.
A man appeared at the old Bailey on Friday (April 15) charged with his murder.