Starters showcase #1: Djinn Carne (black rice, lactose, and butter starter with freezing treatment)

(edit September 10th: I found Djinn Carne behaves differently toward lactose and powdered milk; she ferments powdered milk much longer than lactose at the same lactose saturation. I will adjust the feeding to favor powdered milk, to aim for substrate specificity. I will edit the post once she settles with powdered milk)
So, weeks ago I kinda promise to make starters showcase posts. God knows I've been beating myself a lot lately and couldn't conserve extra energy to make dedicated posts about my starters.