Aw, even his mom has trouble finding him. Lol. Seita never seems to have an issue with it. Maybe he's like a unicorn and only truly innocent and pure people can see him. Haha. Though that would preclude Kubo's older sister.
But it's nice to see a mother drawn like an actual mother in a manga instead of just looking like your regular hot teenager. She's cute, but obviously is older with a bit of weight on her, like a normal person.
Still, if Junta is like his dad, I wonder how his mom found him. Maybe as he got older, Dad started to stand out more?