Depending on the type of elf and their other half, half-elves may be sterile (like a mule). Some species of elves cannot interbreed with other races (example: ferais), so that there is no possibility of a 'half' anything.
Occasionally, quarter-elves or three-quarter elves are referred to as half-elves for ease of 'classification'.
Depending on the cultures involved, halfies may be subject to racism from both their originating species, producing what is known (derogatively) by some as 'Half Breed Angst'.
Half-elf characters: