2. Skill: 5.4x with 26% lv.1 and 34% top. Now it becomes standard for single target attack. It's a high standard however and it will get the job, killing a boss especially the pierce-weak one, done without problem. It also goes well with Ume's high atk as well. However I'll deduced point a bit with lv.5 not has skill act chance at 36% like other girl with 26% skill act at lv.1. 4 rainbow skillblooms are rare and the payback is a little too low.
Grading: A-
Like I said on my vote, wikia seems wrong about Ume skill act. It should be 38% at lvl 5 since Monday.
According to Wutan translation of it in chatchit:
【Target character】
· ★ 6 Ukitsuriboku (Competition), Ume, Sakura, Daisy (Halloween)
· ★ 5 Ifeon, Kakara, Tachibana, Yamayuri, Jorgao
· ★ 3 Moth orchid
※ ★ 3, ★ 5 characters will be battle skill adjustment after sublimation to ★ 6.

【Change before】
Deal 5.2 times damage to an enemy unit
Skill Lv.1 Activation rate: 26%
Skill Lv.5 Activation rate: 36%

【After change】
Deal 5.4 times damage to an enemy unit
Skill Lv.1 Activation rate: 28%
Skill Lv.5 Activation rate: 38%
It will not change anything vote wise but it's still better girl wise (with that she got almost 5% skill activation more with her skill act ability).