Soulmates

Soulmates. They have been the existing since the beginning of time. They are the other half of a supernatural creatures soul. The ones greatest and only significant other. They would rather die than to have their other get killed and so will protect each other till ones dying breath.

In which Klaus's fraternal twin brother - Jeremiah falls in love with the last natural scarlet witch and a Original werewolf descendant.

Or

Which Jean Donovan - the unbound witch is soulmates to an original but has to share, at least her magic likes him

And

Which Lindsey Lockwood find out that her wolf will give the original a chance to speak without punching him. As well as the fact that she is his mate.