Yes, that's covered in the TV series. She thought that he was work-obsessed and had essentially abandoned her in favor of his job. However, when the Hanagumi met him, he turned out to be a very pleasant fellow who was putting all his energy into personally making sure his company turned out the very best equipment for keeping his daughter safe while she did her very dangerous job.
-- Bob
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The Internet Is For Norns.
-- Bob
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The Internet Is For Norns.