Mercury's Links
Mercury has several feelings about his killer. Most are of the fear and murderous rage variety. He doesn't enjoy his state of maybe-kinda-stasis all that much.
Zacary cares about Mercury about as much as he does any of his other victims. Which is to say, not at all. Zacary is too busy doing Zacery things to remember the face of one of his countless victims.
Mercury is a bit wary of Ash, but then again he's wary about all the foundation employees and personnel. Outside of that the two get along quite well. Ash is a weird dude who talks with the weirder things that the foundation hides from Mercury (what's an 'SCP' anyway?), but he can't be that bad can he? He helps dress Mercury's flesh wounds anyway. Ash has a calming effect.
Don't tell anyone but Ash may or may not be crushing on Mercury. Shhhh