Gollum
Gollum is a fictional character from J. R. R. Tolkien's legendarium. He was introduced in the 1937 fantasy novel "The Hobbit", and became an important character in its sequel, "The Lord of the Rings". Gollum was a Stoor Hobbit of the River-folk, who lived near the Gladden Fields. Originally known as Sméagol, he was corrupted by the One Ring and later named Gollum after his habit of making "a horrible swallowing noise in his throat".
Cell (Dragon Ball)
A few years later, Goku imagines Cell in a training sequence, defeating him with a blow to the head. When he travels back to the past again, Trunks reacts in confusion to seeing Goku alive as he remembers his death from Cell's self-destructing and not long after, Bulma is revealed to have retained the Time Capsule that Cell had stolen from Trunks to return to the present timeline. Cell is remembered by Trunks when he notes the differences between Gohan as a child, in particular when he fought Cell, and him as an adult upon meeting him for the first time in years. An illusion of Cell appears in the Forest of Fear to Krillin and Goku, attacking the pair and growing in size before Krillin concentrates and dispels the illusion by confronting his fear.