Ok,. Answer for Question 1: Dobby wants to help Harry Potter because he brought about the downfall of Voldemort and things were much worse for his kind under Voldemort and largely better (for his kind) after Voldemort's fall Answer for Question 2: Severus is a very accomplished Legilimens. He can block anyone from his mind. So Voldemort couldn't see what he was really thinking. And also Severus isn't really a Death Eater death eater, he's what I call "Undercover". He isn't evil, if you think why he was the one to kill Dumbledore, it's because Dumbledore had a blackedn shriveled hand. And severus helped him, but said he had less than a year to live. So Dumbledore arragned for Severus to "Avada Kedavra" him. (The answer is, he is not exactly a Death Eater and has always been loyal to Dumbledore, because of the love of Lily) Answer for Question 3: The name is Bartemius Crouch Jr. He pretended to be Mad-Eye during the Goblet of Fire book. He was discovered because of Veritaserum, the potion of truth. And he used Polyjice Potion to look like Mad Eye. He trapped the real Mad Eye in a trunk, and he took Mad-Eye's Blue Whizzy Eye and put it in his eye slot. In the Fifth Book, Harry Potter and the Order of the Pheonix, the REAL Mad-Eye says, "It kept on sticking ever since that scum wore it" (Or something like that.) AND THEN he asks Harry to grab a glass of water for him to dip the eye into the water. He then says "Cheers" and drops the eyeball in. The eyeball whizzes really funny in the glass. Then Mad Eye puts the eyeball back into his eye slot. Answer for Question 4: Sirius Black was NEVER a Death Eater to me. Although he is a little flawed, he isn't evil. He was only ACCUSED of killing Peter Pettigrew, a.k.a. Wormtail. NOW Pettigrew actually betrayed the three others, Padfoot (Sirius), Prongs (James Potter a.k.a. Harry's Dad), and Moony (Remus Lupin, a werewolf and DADA Teacher). These four (Four including Wormtail because he was once friends with the three too) made the Maruader's Map. In Harry Potter and the Prisoner of Azkaban, Harry figures out the stuff. Also I dislike Proffessor Lockhart. He's really a coward, did you see that he stole other people's work and took it as his own? Also he runs away, after boasting that he knew where the Chamber of Secrets was. He literraly packed up, and he sprinted and then Harry caught him. Now they got to the girls bathroom, and Lockhart met Moaning Myrtle, a ghost killed by the basilisk. Anyways, Harry finds the snake thingy and he speaks Parseltoungue and it opens up, and then they drop down a weird slide and land in a huge pile of trash. There, Lockhart uses Ron's wand (Broken Wand, so it backfired) to do a memory spell. Instead it hit him. So yeah, he Sort Of lost his mind and he was like, "Who am I?" . WHY AM I SO OFF TOPIC??? Welp I was just trying to explain.