That was a good fic! I like the plot and Skuld's need for Scarlet! Continue!

Hmm, Skuld is obviously being controlled, and Urd is OK, but Belldandy would never act fearful of anything if she thought Skuld was being controlled by a malevolent force, which she obviously is. You probably haven't read Terrible Master Urd, so you don't know how Belldandy reacts when this sort of thing happens. In short, in TM Urd Belldandy became completely focused on getting Urd (and later Keiichi) back from the influence which had taken control of her. She never once cowered or cried, she just destroyed everything (the Urn, Fenrir, and Midgard) between her and her goal of saving her loved ones. She was still nice, sweet Belldandy (she said a eulogy of sorts for Fenrir and Midgard as she took them out - she obviously regretted having to do it), but she didn't let that slow her down. Not that she would kill Mara, just that she would take forceful action to make Mara release Skuld. And, of course, Urd wouldn't miss an opportunity to beat up Mara again, especially since she was picking on her little sister!

Fics can be set in alternate universes, that's the beauty of them. ) Mara must have done a real number on Skuld here. Under normal circumstances, Skuld wouldn't just destroy stuff for fun and she would never even think about attacking Belldandy even with the threat of losing Noble Scarlet. It should be OK here, as you have provided an explanation via Mara. Couple typos here and there. Not many tho, good job formatting. This line seems to hold the most power in the fic:

"Sobbing, Skuld continues to attack Urd and Belldandy. "You never cared! Scarlet is the only one ever there for me! You always try to take her away from me! No one will ever part us if I destroy you two!"

This should be fixed as it imo is the most emotional line in your story. The last line should read something like

"No one will ever part us, even if I have to destroy you two!"

Good job! Looking forward to the next chap.

Nice try, but redundant. Skuld recently got her angel back in the actual manga.