Miyazaki Amisa played Sononi in DonBrothers. Hence her character being named DekaPink Sononi and the reference to DonBrothers at the end.
When Yanma says that Jasmine is motherly and selfless, that's a reference to when he used those exact words in an interview last year. In it, he admitted that Jasmine from DekaRanger was his first crush. [1]
Like the other DekaRangers, Ten's name is a type of tea. Tencha is the name of the leaves used to make matcha.
Hashimoto Keiko who is the suit actress for DekaYellow also played her in the original series in 2004. Kamio Naoko was the stunt double for Umeko, but didn't play DekaPink until now.
