I think those are the teenager characters. If you want the Mame family, raise bonding to 100% before Mamekatchi turns into an adult. Once Mamekatchi turns into an adult, and you have 100% bonding, most likely it would turn into a Mametchi, wait for atleast 48 hours (2days) and make sure you have 100% bonding, then click on dating show and if the matchmaker person pulls out something other than a Chantochi, dont marry it, it must marry a Chantotchi.