DreaMarbleng (ドリーマーブリング)/theories

Dark side of Irotsuki
Even seems to harmless dreamer, artist Irotsuki have a dark side, but this evil personality hidden among chasers, and this chaser is True Failed Maker, you see there is two Failed Makers, BUT even if they looks same shades of colors is different and one of them don't have eyes and have something like a bloody stain or spot on a face, and this is True Failed Maker aka Senshoku, but in compare of her failed clones Senshoku not attacking Iro-chan personally, she tried ruin dream of her original, judging by her actions, how she actually killing some dream monster like NPCs, she can reflect hidden disgust of Iro-chan to her arts, that meaning Irotsuki been so uncertain i her own art skills so these negative feelings flowed in that special chaser, also since one of chasers is copy of Iro' lil sister but in negative, that meaning Senshoku and her failed clones is bad drawn copies of Iro, her other selves.

Parents of Irotsuki
Doctor Dandy and DS-QM can be father and mother of Irotsuki and Riyu (little sister of Iro-chan), this can be proved by fact that Doc D and DS have almost same color of hair like of Iro, probably situation is, Iro's mother been very sick, and Iro often buy a medicine for her, meanwhile Dandy was a scientist and been so busy that can't take a time and care about DS and their children, in the end DS is gone from her sickness, after that Dandy seems to became distant for his kids and fully dig in his work, but probably in ending with a letter, this letter from him, where he is apologizing for that he was a bad father and that he will return soon to care about his kids, but question is, can Irotsuki forgive him.