So I really like this Rikako, she has a lot of raw talent and that it-girl quality that draws you to her. But, like Take-chan, she needs some grounding first. Some training to refine her flail-tastic dancing, and something to draw in and focus her energy. With some time to train she could be really great. Maybe for 13th gen, or even an egg unit.
MM adding an AKB lookalike might read negatively, like they're just adding her to cash in on AKB's popularity. Anyway, adding her now I feel might go to her head, since she's already confident as is anyway, and that could be bad for group chemistry. Make her really work for her spot, if one is being reserved for her. Idk. That is just the vibe I am getting from her currently, and how it could potentially unfold later. It could all turn out perfectly dandy too though.