(First off I'm only about 10 episode in so I don't know all of the characters)
when Ruby started to be the leader of RWBY Weiss has be giving her nothing but a hard time Yang and Blake try to stop them Yang knows that Ruby been having a wetting problems during the night and some times during the day too Blake took Weiss out to talk so that Yang and Ruby were along.
"Ruby I know that Weiss is hard on you sometimes but the wetting got to stop" Yang said helping Ruby get clean clothes on
"Sis I don't like the wetting but if I could stop it I would" Ruby said
"Ruby I think I got a way to keep your clothes clean but you may not really like it" holding a bag up
"Sis don't tell me thats what I think it is" Ruby said
"look sis I don't really want to wash your wet clothes anymore so we can do this the easy way or the hard way and yes there diapers but this is meet to help you before it gets any worse if you know what I mean" Yang said opening the bag of diapers
"easy way" Ruby said started to lay a towel down knowing her sis would put her in one anyway
after Yang put the diaper on Ruby there went out to go get something to eat