Cerberus Langarm was a wizard who worked for the Ministry of Magic as an Department of Magical Law Enforcement officer tasked with liaison between his own Department and the Department for the Regulation and Control of Magical Creatures. It is presumed that he was tasked with other things, as well.


Langarm would pass on intelligence, regarding nasty run-ins between dangerous magical creatures and humans to the Beast Division. Also charged with attending to the legal aspect as well as ensuring the safety of his the general public. Langarm would occasionally accompany his co-workers and secure the area in which the beast in question was believed to be located, to prevent civilians from entering it and thus avoid further injuries.

He helped investigate the attack on Chudley Cannons' keeper Gordon Horton.[1]


His first name is the Latin version of Kerberos (Κέρβερος), the three-headed dog which in Greek legend guarded the entrance to Hades. His last name appear to be a pun on "long arm", as in the idiom long arm of the law, used to refer to the police.

Behind the scenes

  • As the most common usage of the term 'officer' in everyday use is that of referring to a policeman or policewoman, it can perhaps be reasoned that Langarm is a member of the Magical Law Enforcement Patrol, as they can be considered to be roughly the wizarding equivalent.


Notes and references

Department of Magical Law Enforcement employees
Department of Magical Law Enforcement logo
Heads of Department
Justus Pilliwickle · Torquil Travers · Bartemius Crouch Sr. · Amelia Bones · Pius Thicknesse · Corban Yaxley · Harry Potter
Auror Office
Heads: Theseus Scamander · Rufus Scrimgeour · Gawain Robards · Harry Potter
John Dawlish · Alice Longbottom · Frank Longbottom · Neville Longbottom · Alastor Moody · Proudfoot · Savage · Kingsley Shacklebolt · Nymphadora Tonks · Ronald Weasley · Williamson · Unidentified Aurors · Unidentified male Auror at Hogwarts · 3 Unidentified Aurors at Hogwarts · Director of the Investigation Department No. 61042
Improper Use of Magic Office
Heads: Travers · Dolores Umbridge
Mafalda Hopkirk · Honoria's fiancé · Mafalda Hopkirk's Ministerial Superior · Rufus Fudge · Orabella Nuttley
Other Personnel
Leta Lestrange · Minerva McGonagall · Elphinstone Urquart · Alastor Gumboil · Arnold Peasegood · Arthur Weasley · Perkins · Cerberus Langarm · Hermione Granger · Bob Ogden · Tulip Karasu's mother · Tulip Karasu's father · Dempster Wiggleswade · Arthur Weasley's ten subordinates