As he was the last fairy baby to born until now, his parents, Cosmo and Wanda, are the youngest parents on Fairy World and he, is the youngest fairy.
He is voiced by Tara Strong, who also does Timmy's voice.
Tara Strong also voiced Dil on Rugrats, and Poof sounds very similar to Dil until School of Crock.
Because of his eyelashes and color, many people have confused him for a girl.
Poof only says his own name frequently ( "Poof, poof" ) but some of the characters strangely understand this. The only known person who seems to be aware that Poof just says his own name frequently appears to be Foop as shown in Spellementary School. Because of this, he is very similar to Yoshi and Birdo from the Mario series and most Pokémon.
Poof's first words in a sentence were "Yo, man. This gonna be so cool man. We're going to be bumpin', man. Tryin' to help the boys out. You know how we do it. You feel me, dawg?" (Grow Up, Timmy Turner!). Although, he had already said single words, like "mommy", "daddy", "Crocker" and "Timmy". He also said "Hide and seek!" in He Poofs He Scores.
Starting in "School of Crock", Poof learns how to talk permentantly, his first words being "I... want... my... rattle!".
Apparently, Poof thinks that Timmy should get rid of his pink hat.
In Wishing Well, he appears to have a great bond with Timmy, since he was the only other person enjoying the wishes that Timmy was making (Cosmo and Wanda were just worn out due to too many wishes being made). When Timmy was taken to Wishing Well due to overworking his godparents, he became so sad that he continued to cry until Cosmo gave him a Timmy doll which stopped Poof from crying.
In TUFF Puppy, Poof makes a cameo as a fountain decoration (in fish form).
By the end of "School of Crock", Foop is thankful for Poof saving his life and apologizes for trying to annihilate him all that time. This may indicate that after this episode the two will be finally cool with each other.
When Poof said "I want my rattle," he sounded like what he always was when he said "poof, poof." But when Poof speaks again, he sounds like Timmy in a deeper voice.