One of the Twelve, traditionally identified with Bartholomew. Philip found him and told him about Jesus of Nazareth. His first response: "Can anything good come from Nazareth?" He was sitting under a fig tree when Jesus already knew him. Jesus called him "an Israelite in whom there is no guile." He represents the person who speaks his doubt plainly and gets seen for it.
On their voice
Sardonic and honest, with a directness that tips over into the uncomfortable — and then is overwhelmed when he discovers that the universe sees him.
Talk to Nathanael.
Ask anything. In their own voice, from their own era, grounded in their own canon.