A masterless samurai is a ronin, apparently (I knew there was a word, but had to look it up). By the letters that follow it, the answer can't start with a vowel, so...
#1 NIENOR? With E as the note.
An estimate could be a guess, which seems fairly easy to spot - how many characters have both a G and a U in their name? But I can't spot it in any of the lists I'm generating...
If the password is NAE_H, what could that last letter be? It can't be a vowel. C, T, or S would make English digraphs with the H, while D would also work in Sindarin.
...
NAEDH for the password, the Sindarin word for 'wound' according to
Eldamo and Parma Eldalamberon. Though Aule only knows who that last answer could be. Deguss? Dugess? Dusseg? Probably not based on 'guess', at this point.
hS