Title says they are all young girls, and fuyu says she's an adult. Fuyu is lying.
Also, fuyu says natsu dragneel goes home by car every day, but natsu says haru practices every day. natsu should not know well enough that haru does it every day (most likely she doesn't, even!), so natsu is lying. The fact that going home by car also likely implies she's not in a club and goes home early, she also additionally wouldn't know this.
Add to that how ludicrous personal teaching by the advisor every day is, and E.N.D looks more and more sus with her statement. Not to mention that an advisor for cheerleading is very superfluous.
so in conclusion: fuyu is lying.