"Loki in the Germanic legends is Bad"
Not even when it is against the other gods at the end of "Twilight of the gods", Loki is not entirely bad. Occasionally turns out to be really useful. In addition is the blood brother of Odin. But cannot say exactly what kind of character has. No other gods are not entirely positive characters. Instead, the end must die for having committed perjury in the war between the northern gods.