Elrond

Elrond Peredhil, or Half-Elven, is a Canon Character from J.R.R. Tolkien's Lord of the Rings. He is the lord of Rivendell and a master of lore and healing. He convened the Council that decided to send the Fellowship to Mordor.

In Canon
He is kind, good, and wise.

In Badfic
He is grumpy, hidebound, prejudiced, often a Designated Misogynistic Bastard, and also often married to Galadriel (in Movieverse fics where the author has not really been paying attention). He frequently pushes Aragorn into marrying Arwen (or vice versa), despite this being almost directly contrary to both book and movieverse canon.

In Badslash
In badslash he is usually paired with either Legolas or Glorfindel (depending on whether or not the badficcer knows about Glorfindel).

Other
He is the Lust Object of a good number of Agents, most famously including Agent Jay Thorntree, who was actually able to get an autograph from Elrond during the eighth TOS mission while in disguise. Despite this, though, he doesn't seem to actually know about the PPC.

At the Official Fanfic University of Middle-earth, Elrond is one of the more notorious teachers due to his fervor for the material, subsequent strictness in class, and his legacy of assigning absolutely unholy amounts of homework. He teaches many of the more central-concept classes such as Numerology 101, which emphasizes the importance of numbers in Tolkien's canon (especially in cases like the Fellowship having nine members. ONLY nine. Never ten, or eleven. Nine).