(Bokura no Love Live! 29) [Tohonifun (Chado)] Soto x Uchi | Outside x Inside (Love Live! Nijigasaki High School Idol Club) [English] [MMAG Translations]
Asaki isn't _that_ obscure -- she's in Rina's episode, yes, but also the last three episodes, albeit usually with her other two friend/classmates who are also in the cooking club.
(I admit I didn't know she had a name, though, and that I had just now gone combing through the first season spotting side characters because the game just gave a sprite and a voice to a new bit character, the Basketball Club captain, and I had to double-check that she hadn't actually been in the anime.)