What parts can transmog change?

Only the Iris line can be transmogrified, Irisalis included. No other Aniimo has these five slots. Capturing Irisalis is what unlocks the system, and from then on Irisalis Prismana carries a transmog option on its own screen.

Color, headgear and wings are the changes you notice first on Irisalis Prismana. Body reshapes the creature's frame rather than adding a piece to it. Sparkle is the fifth area. Floral Glow is the default preset and comes provided automatically, so you have a look to fall back on before you change anything.

Every roll costs one of two appearance gacha materials: Radiant Dreamshadow, the yellow one, or Shimmering Driftshadow, the purple one. Results come in rarity grades of blue, purple and a top gold grade. Save a result you like as a preset before you roll again. Your history keeps only the last 10 rolls.

Not settled: The number of custom presets you can keep for these looks is not settled. It has been given as 10, as four and as three, with three described as up from two.