User blog comment:Godisme/The Time Discipline/@comment-44061-20110210053054/@comment-3344282-20110210203003

Does it really matter so much for you guys if it was Ichigo´s mother or father who was attacked back then? For me, the arc´s plot hints towards Isshin: He went missing at the start, Genjou started inquiring about him, he´s a shinigami (who get attacked by hollows a lot).

Using my imagination I could also come up with a past which nails it down to Ichigo´s mother - but does that really matter?! Face the facts: the only proof we have (yet) that she was attacked by a hollow is the incident with this fisherman hollow (forgot his name) when she was killed - after Ichigo´s birth!

Sure, an explanation why a shinigami would marry a human would be nice. Also, an explanation why Isshin lost his powers 20 years ago would be nice. But until we are presented facts inside the manga, it´s pure speculation.