I think I actually have two: Kannagi Maro, also known as Fukuda Kanon, a former ANGERME member, and current METAMUSE member <3 she was always my fave in s/mileage, and as years went, i related more and more to her and her own struggles about herself, and felt inspiring, so are happy she's an alt idol and being happy!
Second is Aikawa Kozue! She was my fave dance cover artist, as well in Danceroid, and later on Dempa <3 she brought me joys for dance, and had the pleasure having her sign and saying i'm an international fan of 10 years