I have heard people say that they think Chumvi and Kula are siblings because of their similiar appearance. I must first say I don't think they do look similiar at all- but I have better proof.
In the book Chumvi and Kula star in, Nala's dare, it says these exact words...
Before Nala had a chance to say more, Chumvi said, "I've got to go, my mom won't let me stay out late anymore."
"See you tomorrow" said Kula. As soon as Chumvi dashed off, Nala said, "He's in for a big surprise. I'm not dropping the dare, only cowards do that."
"Come on, Nala" Said Kula-
And the rest is unimportant. But it is obvious that the way Chumvi says my mom rather then our mom and he has to go but Kula doesn't, surely indicates that they are not siblings. It can be found here by the way...
http://snowlands.ru/en/library/series/t ... /page1.htmOn page 16.