Some of the characters in the series became official in the Sanrio canon, for instance, Kuromi, who appeared in the first series became an official character to the Sanrio franchise in 2005.
Some of the characters in the series became official in the Sanrio canon. This was for instance. Kuromi was instance. Kuromi appeared. This was instance. The first series became an official character to the Sanrio franchise in 2005.