To the casual observer, Sheena appears to be composed. To anyone that has ever been in a relationship with a woman, when she stops answering with words and just used noises, you know that she is a seething cauldron of hate that's just about to explode.
So I tried searching the internet for how to spell out the "Tarzan Yell." Wikipedia has an entry designated to Tarzan Yell with many different sources and some video clips. There is an actual trademark for the Tarzan Yell attributed to Edgar Rice Burroughs, (Inc.) author and creator of Tarzan. The trademark specifies this sound as the official "Tarzan Yell."
a semi-long sound in the chest register,
a short sound up an interval of one octave plus a fifth from the preceding sound,
a short sound down a Major 3rd from the preceding sound,
a short sound up a Major 3rd from the preceding sound,
a long sound down one octave plus a Major 3rd from the preceding sound,
a short sound up one octave from the preceding sound,
a short sound up a Major 3rd from the preceding sound,
a short sound down a Major 3rd from the preceding sound,
a short sound up a Major 3rd from the preceding sound,
a long sound down an octave plus a fifth from the preceding sound.
Obviously, I couldn't fit that into a word bubble. The text that I used in the bubble "Ooo-wa-ooo-aaooaaooaa-ooo!" is a modified Tarzan Yell first used by Donkey Kong in the Nintendo video game: Donkey Kong: Jungle Beat.
Seriously. I am not clever enough to make up all of that.
Boilerplate:
The Real Superheroines of Hive Valley is a webcomic about a reality television show following the lives of seven public domain superheroines that all live together in the same mansion in the elite community of Hive Valley.
Drawn in Clip Studio Paint Pro on a Surface Pro 4. Here's the timelapse video: