to be honest, if the effect is applied trough standard attack poison tai does not deliver poison to an evading ninja like masked man or minato, but if is applied trough a mystery full tai or half nin/half tai, then is applied even if the enemy evades it.

So, in your case, Sailor sakura standard attack doesn't apply it if is the 1st standard attack that hit the evading ninja, but han and roshi mystery do it.