Skadi is often portrayed as a very mysterious, careless and cold character, based on how she acts towards others, but once you get to know her you will learn that the reason she acts in this cold unfriendly way towards others really is that she is afraid of losing the ones she cares about.

On the battlefield Skadi is extremely efficient, and is often described as inhuman due to her seemingly never-ending stamina and extreme power. She wields a giant sword capable of ripping anyone to pieces, which has led to rumors that she is not 100% human as is also explained in archive file1.
“She will more often try to execute operations single-handedly and leave her teammates to clean up her mess, which has fostered resentment.  Playing off her cold, sarcastic demeanor toward others and her relentlessness in battle, a rumor has emerged that she is part-demon.”
She is often talked about in a way that revolves around the depths of the ocean.

“Down beneath the vast blue sea, below the white waves that lap endlessly at the earth, lies all that I once held dear.”

“I'll show you the dance of the depths.”

“Who knows what lurks within the kelp forest?”

“When you've made the long journey through the dark up to the water's surface”