理由
Yuumi is unfavorable in a specific way: it’s not that she stops you from engaging, it’s that she reduces the value of your engages if you don’t convert fast. If your all-in doesn’t kill, Yuumi heals, speeds the target up, and lane resets—except you’ve spent cooldowns and often your HP.
レーン戦への影響
In lane, every attempt becomes “all or nothing”. If the enemy ADC plays safe, Yuumi can win the war of attrition: you take poke, you engage, it survives, and the lane restarts. Midgame, she amplifies a fed carry and makes picks harder because the target becomes difficult to finish.
立ち回り方
Think in explosive windows: engage only with a clear advantage (wave, level, jungler nearby) and aim for fast executions, not extended trades. Key timing: at level 5 your R gives you a more reliable all-in; if you can’t kill, at least take flash + objective tempo (dragon). And if Yuumi is attached, your target choice must be even stricter: punish positioning mistakes, not habitual engages.