For leoruggie I have only something horny tbh... Nothing in particular but

Thinking that they got together after Leona paid Ruggie to deal with her physical needs
Sex drive of people that age is usually pretty high and in beastmen's case it's even worse, heat cycles make it unbearable without a partner. To find a suitable man in all-girls school is unreal, so in Savanaclaw they don't mind helping each other out

Leona trusted Ruggie with cleaning her sex toys and buying new ones, she didn't care enough to bother.
It's hard to get Ruggie flustered, she was ok with that type of job until she slowly got interested in seeing the process of usage said toys. Leona's panties smelt too alluring after her heats to hold back
Once Ruggie brought some unrequested toys on top of what was asked
Leona didn't get angry, just smiled smugly and teased, suggesting a payment for the help of trying those things out if Ruggie wanted her to use them so much

During sex Leona usually lies there and takes it, Ruggie has to work with strapon, fingers and tongue just to satisfy her. It takes a lot of time and effort

Also Leona wears sport tops for plays, for everyday has some expensive and fancy underwear. She doesn't like things that feel tight on the skin tho. A support for the chest is nice, but she usually doesn't move enough to use it