Currently online characters are listed here: https://nwn.sinfar.net/server_status.php

If you are looking for a specific character, you can find it here: https://nwn.sinfar.net/search_characters.php

You can upload custom portraits for your characters here : https://nwn.sinfar.net/portraits_uploadform.php

Images for portraits have to comply to these standards :

Format : TGA

Portrait_H : huge (256×512 canvas; upper 256×400 used), 385 Ko.
Portrait_L : large (128×256 canvas; upper 128×200 used), 97 Ko.
Portrait_M : medium (64×128 canvas; upper 64×100 used), 25 Ko. (Mandatory)
Portrait_S : small (32×64 canvas; upper 32×50 used), 7 Ko.
Portrait_T : tiny (16×32 canvas, upper 16×25 used), 2 Ko.

You can edit your character's biographie by searching your own character(s) here : https://nwn.sinfar.net/search_characters.php