I'm not sure about any implications of narcissism here or anything so far that provides any evidence that says this person should be approached with any more caution than any other unknown online person. But as a general rule, keep in mind rarely is it a likely real bond that happens "immediately" or even really fast. The thing is those types of "supposed" bonds are usually superficial, not very deep.

With any relationship regardless of quick infatuation, a bond or anything. be wise in how quickly you trust someone. Trust a stranger without any kind of evidence that they are trustworthy will in most cases just lead to learning some hard lessons in life.