Headcanons for being the newest - and possibly worst - deatheater:
— "I must be the one to kill Harry -" crunch "-Potter!?" the Dark Lord finished lamely a murderous glint igniting in his crimson eyes as he turned to you. An unsettling silence engulfed the long table and all of a sudden your 'potato chip munching' rose in volume as if someone was blasting it on a boombox in the library. You paused mid crunch "Sorry, my Lord I didn't mean to make your statement seem... anti-climatic.". When the apology, accompanied by wet crumbs flying through the air did little more than add disgust to the furious expression of the deadly wizard you did the only thing to turn this around: "Okay guys, who is up for killing Potter!?" Sadly, your present colleagues didn't seem to catch on to your fake enthusiastic cheering. "Well, some people obviously need to work on their dedication!"
— It was a mystery to Lucius how your disrespectful, annoying existence hadn't ended right then and there. Now, he had to suffer the idiotic newcomer. "Get ready, the children must be here any minute. Potter needs to get the prophecy so don't harm him. The rest-" his mask obscured the disturbing smile stretching over his face but did little to hide the malice bleeding into his voice "-are to be disposed off."
"Sooo, ... do you guys stand around and wait for things to happen a lot?" Malfoy's knuckles turned white while clenching his wand and Bellatrix was mustering you, seemingly trying to decide if she had lost her last bit of sanity now. "Just asking... I mean I love being part of this-" some undefined waving motions followed "I just didn't imagine there would be so much waiting involved."
Only the fear of his Lord's wrath made Lucius contain his anger -somewhat. "Shut your mouth and do what you're told!" "Right, the waiting thing, got it." A deep sigh rose from the Slytherin. "Just find the damn children!"
— Astonishingly becoming best buds with Greyback: At first he tried to creep you out by sniffing you in the 'I'm-a-big-bad-wolf-way' but you just seemingly unaffected stated: "I know! I do smell tasty!"
— This is a match made in the deepest pits of hell. The only thing more disturbing than Greyback creeping behind everyone is to add you, standing around sporting your lazy smile. Though, inseperable your attitudes clash famously.
— At some point you're the one wearing a colorful outfit to a meeting. It sure felt like Elton John, in full stage wear, attending a funeral.
— Taking the meeting seriously has become increasingly more difficult since your arrival.
— The Dark Lord giving you the most dangerous and impossible missions, ignoring Belatrix's screeching 'Let me do it!' With each mission he is content in the belief that he finally managed to kill you, however, some higher force seems to have you planted on this earth to haunt him: You survive any encounter with Dementors, Aurors and Dumbledore's men.
— A betting pool on what would finally do the deed and kill you was established by Snape and Lucius. Unbeknownst to them Greyback placed 'his bet' on 'Chocking on Popcorn during a long monologue of our Lord' on your behalf.
At his bewildered expression you simply shrug. "It's how I'd love to go out. You know: Fighting the good fight!"