Lock's Quest Easter Egg - Drawn to Life Is Dead

In the 1st place you go to with graves, tapping on the graves will let you read them.
Grave 1: Here lies The Mayor

Grave 2: Here lies Mari

Grave 3: Here lies Wilfre

In case you didn't know, they are all characters from another game from 5th Cell, Drawn To Life.

It is unknown how Raposa could have graves in the human world, but then again Mike was a human so he could have taken them there.

Also Banya is in this game.