"Otherkin are a community of people who identify themselves as non-human in all but outward form, contending that they are creatures traditionally associated with myth or legend. The therian, vampire, and draconic subcultures are related to the otherkin community somewhat, and are considered part of it by most otherkin, but are culturally distinct movements of their own despite some overlap in membership.
"Some may claim to be able to shift mentally — meaning that they may experience the sense of being in their particular form while not actually changing physically. The existence of Otherkin is variably explained as being made possible through reincarnation, having a nonhuman soul, ancestry, or symbolic metaphor." (Source)
"Otakukin believe that they have the souls of anime characters, or at least come from worlds represented by anime, or other modern fiction. Many Otakukin attribute this belief to reincarnation, although some have other definitions of their origin. Although you may be asking yourself how someone can be the reincarnation of a person that doesn’t exist, for most Otakukin their identity hinges on the belief in multiple dimensions or words wherein other situations, including those depicted in anime, actually happen." (Source)
Otakukin is a subset of Otherkin, a specific manifestation of that phenomenon. As explained at the Otakukin source, these folk differ from SoulBonders in that "they share an identity or soul with a given [character/creature], while soulbonders believe that they are in communication with an outside entity." It is a subtle distinction, but SoulBonding does not depend on reincarnation to exist (though the two are not mutually exclusive either). One can be Otherkin, Otakukin, and a SoulBonder simultaneously as well.
"Some may claim to be able to shift mentally — meaning that they may experience the sense of being in their particular form while not actually changing physically. The existence of Otherkin is variably explained as being made possible through reincarnation, having a nonhuman soul, ancestry, or symbolic metaphor." (Source)
"Otakukin believe that they have the souls of anime characters, or at least come from worlds represented by anime, or other modern fiction. Many Otakukin attribute this belief to reincarnation, although some have other definitions of their origin. Although you may be asking yourself how someone can be the reincarnation of a person that doesn’t exist, for most Otakukin their identity hinges on the belief in multiple dimensions or words wherein other situations, including those depicted in anime, actually happen." (Source)
Otakukin is a subset of Otherkin, a specific manifestation of that phenomenon. As explained at the Otakukin source, these folk differ from SoulBonders in that "they share an identity or soul with a given [character/creature], while soulbonders believe that they are in communication with an outside entity." It is a subtle distinction, but SoulBonding does not depend on reincarnation to exist (though the two are not mutually exclusive either). One can be Otherkin, Otakukin, and a SoulBonder simultaneously as well.