Note:
Unique identifier for the four characters:
Retain with sd1.5, rename, resize to 512
$a1-zfy$ (not working well, since "azfy" is not unique)
$b2-zmk$ (working ok)
$c3-zml$ (very good)
$d4-zyz$ (very good)
example prompt:
$bzmk$ and $czml$ in Christmas photo cards, highly detailed, sharp focus
a portrait of $czml$ infant, intricate, elegant, highly detailed, digital painting, artstation, concept art, smooth, sharp focus