Chitose Hibiya from Chobits appears as Chitose Mihara who is Kobato’s landowner. She has two children by the name of Chiho and Chise who look like Chii and Freya from Chobits.
Udea Hiroyasu from Chobits is the owner of Chirorou bakery. Omura Yumi from Chobits also appears as Ueda Hiroyasu’s assistant.
The fortune-teller from xxxholic appears in Exam 4 and plays New Year’s games with Kobato. There is also the fortune-telling pendulum in house.
Asahi Hinata and Asō Shirō from Suki: A Like story appear in Exam 7 and give Kobato an umbrella.
Suzuhara Misaki and Kizaki Tamayo from Angelic Layer appear in exam 9, selling beer along with Primera from Magic Knight Rayearth and Seto Ringo from Angelic Layer, selling Ice cream.
Kakei, Kudō Kazahaya and Himura Rikuō from Legal Drug appear in the Green Drugstore in Drop 5.
Touya Kinomoto who is Sakura’s brother from Cardcaptor Sakura appears in Drop 5 dressed up in a bunny costume which looks like an Usagi, who is a messenger from heaven in Wish.