Yes many people die in the series.Most of them are relatively small characters but there are several big time characters as well. Cedric Diggory dies in Goblet of fire.Prof. Quirrel dies in "stone", Sirus Black dies in "order",Dumbledore dies in "prince" one of the weasley twins die in the deathly hallows along with mad eye moody and Severus Snape.
loads of people get killed in Harry Potter : EXAMPLE... Professor Quirill, Dobby, Bellitrix lenstrange, and so many more
There isn't anybody in the Harry Potter books called Henry. Or "Herny".
yes, Albus Dumbledore
He didn't kill anybody.
Yes.
No.
There are hundreds of Harry Potter characters it would be impossible to list all that didn't die. Instead see related questions for a list of those who did die, anybody not on that list didn't die.
Not during the series.
There is no Niki in Harry Potter.
There is no such character in Harry Potter.
Yes Voldemort does die, Harry Potter defeats him
I am not aware of any Lydia in Harry Potter - nor of anybody with a similar name. The closest is perhaps Lily - Harry's mother.
Harry Potter doesn't die and if you want to know for yourself, then read the Harry Potter series, espeially number 7.