Interest Stacks

Rin's dad
Izumo's mom (introduced in s3)

Ash's dad

Luck's mom
Finral's parents
Noelle's dad
Vanessa's mom
Henry's parents
William's parents
Grey's mom

Kayo's mom

Todoroki's dad

Rei's dad

Tomoya's dad

Lelouch's dad

Heiji's dad

Koji's dad

Touma's dad

Hyakkimaru's dad

^^

Most of the Souma parents

Anko's mom

Ono's parents

Satoko's dad

Killua's parents

^^
Gyro's dad

Josee's grandma (i assume she was just as shitty a parent to her kid as she's a shitty grandma to her grandkid)

Megumi's dad

Kikoru's dad

Rengoku's dad
Uzui's dad
Genya and Sanemi's dad

(They all appear or are mentioned in later seasons)

Sherry's mom

Georgie's mom

Aya's dad

Hinata's dad
Sasuke's dad

Kakeru's mom

*I know to anyone who's watched the anime this might sound mean because of (spoiler), but if you pay close attention to the details of this series you'll notice that unfortunatly this realationship is far from healthy

Kana's mom

Shinji's dad

All BAE members parents

Hibiki's parents

Crona's mom

Kurisu's dad

Asuna's parents
Suguha's mom

Hina's dad

Canute's dad

Tatsuya's dad