ye prob.Im pretty sure it goes like this.
Terra's heart- LS
Terra's body+ soul- Xehanort
MX's heart- Xehanort.
Which would mean that Xemnas is Terra's nobody and Xehanort's heartless is MX's heart.
Is that right?
but rly xemnas is terra's nobody but not really terra's nobody. xemnas lacks everything that terra is besides body wise but thats it.