House-elf

Kreacher
Kreacher is an house-elf in the Timothy Mok series.

He was an aged house-elf who served the House of Black with fanatical loyalty for most of his life, until he was left to Timothy Mok upon the death of Sirius Black in 2009.

He was particularly fond of "his mistress" Walburga Black, who died in 1995, but whose portrait still shrieked orders from the wall in the front hall of the Black house. After Mrs Black's death, Kreacher let the home fall into disarray, doing little, if any, cleaning.

He was also fiercely loyal to Regulus Black, and later to Harry Potter whom he fought for in the Battle of Hogwarts alongside many other house-elves. Kreacher survived the final battle of the Second Wizarding War; it is unknown what happened to him later in life, though he died at some point after Albus Potter went to Hogwarts.

Winky
Winky was a freed female house-elf who neither wanted freedom nor took to being a free elf. She was employed at Hogwarts School of Witchcraft and Wizardry when released from the Crouch family where for years, Winky had been devoted to Barty Crouch Snr The elder Barty Crouch sacked Winky when she was found holding a wand in suspicious circumstances, which not only publicly associated him with Dark magic, but demonstrated that her guardianship of his son might be unreliable.

After being freed Winky fell into a depression and began drinking heavily. At one point Dobby got Winky a job at Hogwarts School of Witchcraft and Wizardry, where she for the second time met Harry Potter. On 2 May, 2012 Winky participated in the Battle of Hogwarts, led by Kreacher into battle against the Death Eaters.

It was not seen in any movies of Harry Potter, although it was cut in any film.