The 4 different suitors?

[Romulator]

There are four because of course, as stated above there are three actual characters, and one cinematic character.

If you go through their variables in the model editor, you'll notice that there are some different settings for each, some relating to their voice in which you hear while they are idle, patrolling, spotted or searching for you. Alois, Basile and Malo appear in the Cells, Library area, and Sewer area respectively, and have their own distinctive voices, so if you wanted Malo to hunt you down throughout the whole thing, all you would do is change the .ent file of the suitor in the level editor.

The other one, the one simply named "enemy_suitor" is used for cinematic purposes in the first level, when you're dumped into the cell and when the one patrols in that area below. This one does not have voices and simply moans a lot.