Plue

Plue (プルー Purū) is a Silver Key Celestial Spirit with no actual combat abilities, stated to be usually kept as a pet for less powerful Mages, including Lucy herself as his owner.[5]His key was sold for 20 000.[6]

Appearance
Plue is a short and stout white creature with bland eyes and a golden horn-like nose reminiscent of a carrot, giving him a slight appearance of a snowman. His body is often shaking nervously, though this doesn't always occur.[3] He cannot speak besides saying "puu-puun", although Natsu seems to be able to understand him anyway. He mostly communicates by using gestures and motions which Lucy finds adorable.[7]

Personality
Because he is not made for combat, Plue serves as a cute companion instead.[8] He is very obedient and ready to help Lucy whenever she needs his help.[9] Along with that, he enjoys sweets and shares a close friendship with Happy and is often seen teasing Lucy and Loke along with him.[10] He is also very apologetic, as he immediately apologized to his owner after harming her under the influence of Sherry's Magic.[11]

Magic and Abilities
Enhanced Speed: Plue is shown to have enough speed to catch up to Lucy while they were running from amysterious figure,[26] as well as to dance faster than one of Daphne's Lizardmen.[27]

Immortality: As a Celestial Spirit, Plue cannot die, unless he is somehow forced to stay in the Human World.[28]

Trivia

 * Plue is the only "dog" Happy likes.[37]
 * Happy plays a trick on Lucy by feigning a voice for Plue. Happy makes a reference to Rave Master, saying that Plue is the servant of a hero with a sacred stone, Haru and the Rave respectively.[38]
 * A special restriction made by Hiro Mashima stated that the number of lines on Plue's nose must be 5, no more, no less.
 * The S-Class Mage Mirajane considers him as the strongest spirit ever.[39]
 * Plue's character was featured in Hiro Mashima's previous work, Rave Master.
 * In the English dub of the first episode, Lucy called Plue's key "Canis Minor the White Dog" instead of "Nikora the Canis Minor".[40]
 * In the Manga, Lucy called Plue's key "White Doggy" instead of "Nikora the Canis Minor".[6]