The main point of creating this mod is to introduce an NPC that isn't primarily one-sided in personality, has a whole history of his own, and isn't a pushover.
While Neh'taniel isn't easily bruise-able, he'll very easily die if you try to make him fight a dragon solo.
The Sir Neh’taniel Mod Pack adds this to BGII:

+ Judicial Knight, Neh’taniel of the Amaunatori, is an NPC who can join your party.
+ He is Lawful Neutral, Wraith, and a Judicial Knight paladin class.
+ He will romance an elf, half elf, human, halfling or gnome  pc of non evil alignment if he/she is not a thief.
+ He comes with special abilities that grow stronger when he reaches certain levels.
+ He does not become abducted by Bodhi, something else happens....
+ He gets turned into something else in the Underdark....
+ His sword has dialogue, even with the only other talking sword in the game.
+ A journal that will update itself when certain levels of experience are reached. As well as "Read to the PC" talks related to his journal.
+ Custom items and spells oh my!
+ Custom paladin kit.
+ Yes, a cheesy theme song.
+ A voice pack.
+ Neh'taniel banters with many of the other joinable NPCs.
+ This mod also introduces other custom characters: Viduan and Sarie.
+ Restoration of the Bioware Slave Lord Quest.