Marco is a NPC located in the Flower House, to the right of the Library/Bank. You need to have at least VIP rank or above to interact with him. He has a quest that will reward you with a Spray Can and access to the Canvas Room.

Where is Rick Hypixel?

Minimap (at Coordinates)

-251, 70, -325 inside the Gravel Mine. You need to talk to him to continue The Flint Bros quest.

Where is the fairy person in Hypixel skyblock?

Minimap (at Coordinates)

129, 66, 137, on the Hub Island.