I would have replied sooner, but I had some stuff to take care of.
The darkness was silent for a short period. "MARA PUNISHES HERSELF
FAR MORE EFFECTIVELY THAN I WOULD HAVE... NOW, SCRUB."
You might be interested in knowing that the Master of the underworld of A!MS
has already been introduced.
HER name is Hild and she just happens to be Urd's birth mother too.
She appeared in the October issue of Afternoon magazine in chapter 135 of
A!MS. That's about 56 chapters from where Dark Horse is currently
publishing.
If you're interested, I can forward chapter summaries of the relevant story
arc.
In the most current story arc, Keiichi's father is introduced as well, and
he is a MOST interesting character...
Perhaps, Fujishima has decided to reveal all the parents at last?