ⓘ

How to get Idol: she only drops from Banner Z of the Hero Summon at a 1% chance - and she tends to appear on Banner Z right after major updates. Save Gems for update windows instead of rolling on off weeks. Grab free Gems from ASTD X codes first.

What Idol does

AbilityEffect
Performance buffAfter a short performance, all enemies take +15% damage for 4 minutes (10-minute cooldown)
Girls category boostUnits in the Girls category get +15% attack
Money generationFirst unit able to generate income - funds the rest of your board early
Deployment limitOnly one Idol can be placed per match

Why a no-damage unit is meta

Multipliers beat base damage

+15% enemy damage taken applies to your whole team's output - on a full board it out-damages most DPS units.

Economy snowball

Early money generation means your real carries get placed and upgraded faster.

Girls synergy

The +15% Girls attack buff stacks with the debuff - build her next to Girls-category carries for maximum value.

One is enough

The single-placement limit means a second Idol never competes for your squad slot - one copy does the job.

FAQ

Is Idol still obtainable?

Yes, when Banner Z rotates her in - check the Summon Gate after each update; the gate refreshes every 30 minutes.

Who is she based on?

Ai Hoshino from Oshi no Ko - which is why she's an idol, not a fighter.

Should I roll on Banner Z?

At 1%, only with a big Gem stockpile. Banner Z typically features her right after major updates - that's the window.

More ASTD X help?

See All Star Tower Defense X for the full game guide and working codes.