(OAVs/Movies)
Seiyuu:
Maria Kuwamura (Quess/Lachesis)
Naga, the White Serpent (or as Lina says, "Goldfish fleces") gives herself the title or 'Ultimate Rival'. She uses Black Magic (and a little Shamanist, I think.) but messes up a lot. She is extremely creative and is definately not undergrown. Unfortunately, she has a very annoying laugh ("OH-HOHOHOHO") which annoys Lina a great deal. However, Naga never meets the regular cast and only appears in the Movies/Specials/OAVs or Slayers games. (i think..)
Seiyuu:
??( )
Jeffrey is in the Slayers G(reat)? OAV. He is an aspiring knight. Unfortuantely, he can't do anything because he's so pathetic. He can't use his sword correctly, and whenever he's in trouble, his mother, who is disguised as anotehr person saves him. It is always up to her so save him.
Seiyuu:
??( )
Raudy Gabriev first appears to Lina as an old man who asks for help from Lina. For reward, he will tell her where the "Spring of Growth" is. He is a pretty powerful wizard when he appears to her as an old man. However, he meets Lina in the past and it seems that he once wielded the "Hikari no Ken" or "Light Sword". He also is related to Gourry since he not only has the same last name as Gourry and has the light sword, but he also looks like a younger version of Gourry (with blue hair) when he meets Lina as a kid.