Waders

From BioShock Wiki

The Splicer model "Waders" is one of Rapture's many religious fanatics, despite the atheist orientation imposed by Ryan. As the name would suggest, he is dressed in fisherman's wading boots. Peach Wilkins, Frank Fontaine, and Atlas appear to be variations of this model.

He appears to either have had the skin of someone else's eye area grafted onto his, or to be wearing it as some form of mask, presumably for "Father" (likely God or at least the voice of God he seems to hear in his head), as he mentions "I wore it for you, Father!". He also can be heard screaming about God's light when he is alone, some notable quotes being:

• "We have turned away from your light"
• "His light shines even down here in the murk"
• "We thought we could hide from the light down here. We were wrong!".
• "That's right! Run from the light!" (if you flee from him.)
• "I traded you, O Lord, for Mammon, and what has it got me?"
• "I curse you with boils!"

On top of this, he can be heard singing bits and pieces of the song "Jesus Loves Me."

As referred to above the skin grafted on his face is an actual war survivor part of  Project Facade. The Toasty model is also a result of this project: They are face models are based on real people.