User blog comment:Salubri/Hollow. Arrancar, Espada & Vasto Lorde/@comment-44061-20100817221643

Yea see I was going from his form as well but Baraggan's form isn't any different either out of the three Harribel is the only one different physically. Now we can attest that Harribel's form changed (sealed and released) as well as her gaining her water manipulation powers. Baraggan's form didn't really change (released but he has a different sealed form) and he seems to have gained his time dilation and respira power but that questionable cause we never saw him fight as a hollow. Starrk has the same form (sealed but a different released form) he doesn't seem to have gotten powers from Aizen as he apparently already possessed it and Lilynette was his powers in sealed form so he is most likely a natural arrancar.