Alonda

Alonda was member of the Kirin Tor who was always looking for a fifth species of troll. She saw an opportunity to gain information about the possible fifth species of troll when young Khadgar was chosen to be Medivh's apprentice. She requested that Khadgar scour the beastiaries of Karazhan for any information. To her disappointment, Khadgar was unable to find anything about a fifth species of troll. Medivh hinted that there was no such thing. Convinced that she was right about the mythical fifth species, she insisted on continuing her search anyway.

Her status is unknown.

Speculation
The fifth troll species sought by Alonda may have been sand trolls or Zandalari trolls, both of which were introduced in World of Warcraft and thus a few years after the release of The Last Guardian. Dire trolls are another option, but they do not seem to be counted as a distinct species of their own since they are found among the ranks of several regular troll types and may either be a natural occurrence or the result of magical or alchemical alteration.