I don't know how but I racked up 350 gems so I figured I'd see if the bloom gacha would be kind to me. Both rolls were mostly salt (only one 5* Knight out of the 22). That one 5* Knight was Rough Potato though and the ticket gave me this nice young lady:

I can always use more skill proc boosts and once I train up Pentas and Statice I'll be able to retire the last 4* Knight (St Paulia) from my active squads alongside Eryngii. It'll help that Rough Potato eventually gains the ability to hit pierce weak points so I can have her act as an off-brand Kugaisou in a second squad.