You need to load campaign assets, go: "File->Dependencies...->Add Standard..." check "Liberty (Campaign)" and "Liberty Story (Campaign)" and confirm. The editor will load campaign-only assets - you are looking for "Portrait - Kerrigan" model.
You can also find all cinematic models used in the game if you look for "SMCHARACTER" model type.
I clearly said you are looking for "Portrait - Kerrigan" model, which is (kinda obviously) a "portrait" model type. Kerrigan doesn't have SM model, because she never appeared in realtime-rendered cinematics.
I'm fairly sure she was always either: pre-rendered (in TV, when fighting Zeratul) a portrait (when she was a unit on map or when was contacting player) a game unit (which uses different model) After all, that there is no SM model of her proves this.
Vyzera to zaujimavo. V ktorom programe si robil 3D model?
(To "vzadu co ma" su kridla? , a dokaze cobec lietat? ^^ sice ked si zoberiem z Warcraft 3 Frozen Throne jednotku "Frost Wyrm" co mal roztrhane kridla a lietal si v pohode, v tom pripade je mozne vo videohrach vsetko ^^)