Lambdadelta doesn't technically have parents on account of being a metaphysical existence... (If you count her human self, though, her parents died in a train accident when she was very young.)

Judai had workaholic parents who were almost never home. For his birthday they gave him a murderous trading card, and then when he suffered a lot of trauma because of it and kept having nightmares, they decided instead of getting him therapy or something the correct answer was to wipe his memories.

A+ parenting