Doctor Mercer

"And so... you succeed, into the light. Succession to the top of your own burning star... Encircling all, ten and three..."

- Doctor Mercer to Sarah about her success.

Doctor Mercer is the deuteragonist in Daylight, as well as a doctor in the Mid Island Bay Hospital and the childminder of the games' protagonist - Sarah. He is often refered as the mysterious voice, who helps Sarah throughout the game.