It was gonna happen sooner or later but it's still sad to see her go. But at least she has a clear path ahead of her and is doing something she is passionate about.
^Yes TeChNiCaLlY Rikako will be the last smileage member as she was introduced as 3rd gen smileage but was she even active during that time? lol
The 3rd gen members were announced early October and the new name (ANGERME) wasn't announced until mid December. So technically she joined S/mileage and I believe performed with the group under the S/mileage name once or twice. So I think they will play Rikako up as the last S/mileage member even though she didn't release any singles/concerts under that name.