What Characters do you guys regret pulling?

By regret I mean a character you pulled and never used at all, I’d 100% refund my Seele but I don’t regret pulling for her cuz she was useful on release. But now for me personally it’d be Silver Wolf I pulled her during the debut banner and I feel like she never really did anything for me, I pulled for design and watched her miss every implant 😭 and now she’s kinda useless cuz I have most of the elements covered. Outside of Acheron is she still relevant? I wouldn’t say mono quantum is relevant 😔