Board Thread:Off Topic/@comment-24993958-20160607185611/@comment-24534644-20160609205830

Split-personality is a bit difficult to make a Semblance for, since Semblances are based on an individual's personality to some large extent, and having multiple contesting personalities muddled it up.

I have it in my mind that it's not impossible for such a person to have a Semblance capable of doing multiple things, depending on which personality is in control at the time. Note: not impossible, but still probably extremely unlikely. Until such a time as we see something like this in the show, I'd recommend sticking to a Semblance that itself represents the fractured nature of the personality of the person in question.