Spirit Partner

Spirit Partners are Duel Monster Spirits that have human partners. Their partners and any other humans that possess the ability are the only humans who can see and interact with them. It's also possible to have more than one spirit partner. The following characters own or have the ability to sense a Duel Monster in one way or another. They are presumably Ka due to Winged Kuriboh appeared in a flashback in the manga.:

• Jaden's spirit partners are Winged Kuriboh and Yubel. Later on, he's also able to verbally communicate with the Neo-Spacians as well as Elemental Hero Neos and Honest.

• Chazz's main spirit partner is Ojama Yellow in the anime, and Light and Darkness Dragon in the manga. However, he is also able to see the other two Ojamas that make up the The Ojama Trio, The Dark Scorpions, as well as all the monsters from the well.

• Jesse's main spirit partner is Crystal Beast Ruby Carbuncle. He’s also able to interact with the rest of the Crystal Beasts plus the ones floating around such as Tom’s Jerry Beans Man. He also considers all of his monsters his family.

• Zane's spirit partner is Cyber End Dragon. In episode 83, it was revealed by Sheppard that he could hear the monster's spirit and Zane later stated that he could hear it crying out in pain after destroying it.

• In the GX manga, Koyo Hibiki is the original owner of Winged Kuriboh before passing it down to Jaden. He too, is able to communicate with his duel spirit.

• Chumley has Des Koala as his spirit partner. It's unknown if he can actually see spirit partners, but he is at least able to hear them.

• Yusuke Fujiwara's partner used to be Honest before he was possessed by Nightshroud.

• Trapper doesn’t possess a spirit partner of his own (he once did, but it was stolen from him by another, unnamed person), but nonetheless, wields the uncanny ability to not only see, but also trap duel spirit monsters.

• Mr. Stein has the ability to only see his own monster, Scab Scar-Knight/Scar-Knight.

• Though Sartorius can not see visually see nor speak to duel spirits, he is able to sense them due to his honed psychic abilities.

• Yubel may be considered a Spirit Partner, though the relationship she shares is mostly parasitic and/or downright harmful to all who come into contact with her, so this is debatable. Notably, however, she does afford great power to those who ally with her, although she often turns on her allies when she has no further use for them. However, after fusing with Jaden and being freed from the Light of Destruction influence, Yubel actually became a loyal spirit partner to Jaden.

• Princess Rose claimed to be able to see duel spirits; though no one believed her, Jaden saw a Des Frog in a Prince's outfit following her after their duel, leading viewers to believe she was telling the truth.

• Aster Phoenix may not have a spirit partner, but he can see duel spirits, but it is to believe that his spirit partner is Destiny Hero - Dreadmaster.

• Luna's spirit partner is Kuribon.

• Each Signer's spirit partner is believed to be their corresponding Signer Dragon.