Ah! My Goddess
It’s none other than Belldandy’s younger and sometimes bratty younger sister, and IT department for Yggdrasil, Skuld!
First off, she builds robots and loves computers, so right away Skuld is awesome. She also derives her energy from ice cream. There’s also the way she debugs the heavens: with a giant mallet! Skuld is also very possessive of her older sister and is constantly trying to keep Belldandy and Keiichi apart, so she can be a bit of a schemer, too.
And there you have it, my favorite goddess: Skuld, the 12-year-old (in apparent terms) technological prodigy.