I don't know if it is just pear's acting or the actual character, but Rarin makes me want to drop kick her LOL.
It seems that Tono is looking for two people. His mom and someone else (another woman), the fortune teller is likely one of them. I have a feeling she might be his mom maybe? She believes in fortune and probably she saw something in her tarot cards saying she has to leave her family to protect them, that is why she has all the calendars and then she flips to one month and is like, "Not long from now and we'll get to see each other."
Still hard to tell if she is his mom though because in the ending of cheer and toey story, Tono went after some woman who was dressed similar to the fortune teller. He also mentions something about finding someone who believes in fate and destiny (but doesn't mean it is his mom).