no ichigo's mom was human and his dad was a shinigami. and the grand fisher the hallow that killed his mother wasnt going after her, he was going after the spiritual pressure that ichigo had. ichigo saw the grand fishers lure and ran to it and his mom ran after him andi believe she was hit by a car or he killed her cant quite remember. and yes karin seen him in shinigami form, he was going after a hallow and he ran by her and later she tells him that she seen him in his komodo
yea and i the grand fisher was the source of her death that much i remember
