| Idol (Tier) | Old Growth (per 10 Days) | New Growth (per 10 Days) | Practical Impact | |-------------|--------------------------|--------------------------|------------------| | | +0.8 Vocal | +1.2 Vocal | You can push Miyu to A‑rank with ~3 weeks of regular rehearsals. | | Riko (Mid‑Dance) | +0.7 Dance | +1.1 Dance | Faster unlock of “Super Dance” skill. | | Aki (Mid‑Visual) | +0.6 Visual | +1.0 Visual | Better stage presence for visual‑heavy songs. | | Sora (Mid‑All‑Round) | +0.5 All | +0.9 All | More balanced growth; easier to specialize later. |