Gus is multilingual. He can speak and sing in English, French, Italian, Latin and Greek
Asparagus is actually very sporty and active. He's a very good acrobat (which is where Tumble and Pounce get it from) and is a good dancer. The reason he doesn't dance is because he doesn't want Jelly to feel like she's the only Jellicle who doesn't dance
Tumble, Pounce and Cettie are the kits of Asparagus Jr. and Jellylorum (in that order)
Demeter and Bomba are sisters. Demeter is the older one by two years.
Macavity, Munkustrap and Tugger are the sons of Old D and Grizabella. Macavity is the same age as Demeter, Munkustrap is one year older than Bomba and Tugger is the same age as Bomba
Out of all the Oldie Squad (Gus, Asparagus, Jelly, Jenny and Skimble), the age order is Gus, Skimble, Asparagus Jr., Jenny and Jelly
Because of what Mac did to her, Demeter is unable to have kits.
Cassandra and Alonzo are extremely competitive
Every time Skimble leaves to go on the train, whether it be for a day or a week or a month, he will always bring something back for Jenny
Skimble and Jenny actually mated quite early. Jenny was around Jemima's age when she and Skimble did the mating dance together.
Every mated pair choose what they want to dance for their mating dance. Vic did a pas de deux (missing some accents there but whatever!) because she loves ballet but Tuggerina did a bold hip hop for theirs. Griz and Old D did an American Smooth. Tanto and Electra (I love this ship now :)-) are going to do a Vietnamese Waltz.
The story of Griddlebone and Growltiger is made up. When Bomba and Demeter mention Griddlebone working for Macavity, it's a theory that Griddle was working for Mac the whole time. No one has ever seen Griddlebone, but the henchcats swear Griddle is working for Macavity. Bomba and Demeter include it in the song as a way to mock Macavity and the lies he told his workers
Electomile is alive and strong
Bomba and Alonzo have tried to murder each other more than seven times