The HQ received lots of feedback about how long it took to rank-up Valkyries, and has now decided to speed up the process to give Captains a better experience! After the v3.5 update, the rank-up process will become phased. Check out Ai-chan's example below to better understand how it works:
Take Celestial Hymn for instance. In previous versions, Captains need to spend 100 fragments to boost Celestial Hymn from S to SS to gain stat bonuses and unlock SS skills.
After the v3.5 update, Captains only need to spend 30 fragments to rank up Celestial Hymn from S to S★ to gain partial stat bonuses.
Captains can then spend another 30 fragments to rank up Celestial Hymn from S★ to S★★ to gain more stat bonuses.
Lastly, only 40 fragments are required to fully rank up Celestial Hymn to SS to gain all stat bonuses and unlock SS skills.
After the rank-up process has become phased, Captains can enhance the stats of battlesuits immediately after receiving duplicate battlesuit drops. Hope this change leads to a better experience for you, Captains!