Growing

Growing (育成, ikusei) allows Producers to increase their Idol Photo's power by Changing, Limit Breaking, or upgrading their Skill Level.

Change!
Changing an Idol Photo increases its appeal value and increases the Idol Photo's Max Skill Level from 5 to 10. In order to Change an Idol Photo, it must accumulate enough Change Points gained from Lives and enough materials (Badges, Rings, Anklets, and Kizuna Bangles) gained from Lives and Work.

Limit Break
By using Saikou Fragments (彩光の欠片, saikou no kakera), Idol Photos can undergo a maximum of four Limit Breaks. The number of Limit Breaks achieved will be displayed as a number in the bottom-right corner of the Idol Photo's icon. Idol Photo-specific Saikou Fragments can be obtained either through receiving Event rewards, rolling duplicate Idol Photos in Gacha, purchasing through the shop (N only), or the Memory Piece Exchange (R or SR only).

Currently, Idol Photos gained from Events can only increase their Limit Break from Kakera gained in that Event.

Skill Increase

 * Main Article: Skills and Center Effects

Idol Photos with a rarity of R or greater have a skill that can be activated during Lives. This skill level is capped out at Lv. 5 for un-Changed Idol Photos, while Changed Idol Photos have a skill level cap at Lv. 10. Skill Level can be upgraded with Lesson Notes gained from Lives, Work, and Events.

Each skill is activated at set random intervals and can affect stamina (Life), scoring, and note timing by a certain percent.