There's only one that comes to mind straight away and that's that f̶u̶c̶k̶i̶n̶ Diabolik lovers chick. She was so dumb it was infuriating, the whole anime was cringey anyways (In my opinion) and she just made it 10x worse. Only good character was teddy tbh. (Rest in peace boo)
For me, there is no such thing as "favorite" ship. I ship all the ships, even the ships that are unshippable or those that cost for shipping and handling. Lol, to be honest, there's so many ships, I'd sink to the bottom of the sea before I'm able to name them all. They're all mostly yaoi ships though, so I don't mind too much about drowning.
Photo from Random Photos