They think you are breakfast

I think i would avoid both of them

Maybe after a little while

I dunno your creepy imagination not mine

Well maybe because they do have that power, but still have their own limits

Who are you to the souls and knights that you liberate and to those that dare undo your efforts?
I am their saviuor, the hero who appear in their final hour to save them, to the harvester, I am more of prey than an annoyance.

What would you do if there were two harvesters on the grasping plateau at the same time?
Call in my SK waifu Desna and she will make sure one of them suffer while I deal with other one. Desna is badbutt so she would be fine.

When do you suppose the harvester would retreat from a resisting knight as its last observed behavior?
You can fight the harvester, and once you showed enough struggle, the harvester will give up since you are not willing giving it up.

Where is my choice for the Shadow Lair of the grasping plateau that I never asked for?
The whole thing, I guess? Filled with howliter, kat and four harvesters while you are at it.

Why are there never two harvesters present in the same relative place if they can manipulate space and time?
If you can be teleported to depth 30 AKA, inside the core, I think it is possible that the dimension are distorted after depth 23, places such as shadow lairs can be acutally deeper than one can expect, in another word, it is possible that the harvester can occupy multiple dimensions at once, hence why he can reveal himself to multiple parties of knights at the same time. There is only one harvester, however, there are multiple grasping plateau that are inparralle in dimension.