random character help

[xI br3ttykins Ix]

on the achievement guide map the characters marked with the blue icons ive been going through them ticking them off and whilst ive only checked about 5 of them 3 of them have not been there??... is this because these are the ones i have killed in the game??, could any post a picture of a labbeled map like which icon is which character so i can tell if its a person ive killed or just my game glitching. would be very grateful.. thanks

[Awfullygood]

Some of the characters have multiple missions. Some of those dots represent those extra missions. Also, certain characters only come out during the day or night it seems.