Sakamoto  

Taisho, 阪本

The black cat who is adorned with a scarf made by the professor has the ability to communicate through speech. Although older than both Nano and the Professor when measured in feline years, this cat speaks with an arrogant tone towards them. Despite this, he prefers to be addressed as "Sakamoto-san". However, at times, his feline nature takes over, causing him to act like a typical cat.