as somebody else pointed out there is a long listed of better suited characters for firework event

suit gaara

temari swimsuit

young sanin

young nagato/konan/yahiko

orochimaru akatsuki

izuna

dan kato

yota

shisuka

duy might

shira

chiriku

guren

hanabi

edo hanzo

naruto *y jutsu

konohamaru shippuden

mizuki

christmas ninja

kage tsunade- I got her from crazy slot machine way back when, but as soon as regular tsunade breaks came she was left in the dust, and since then even better variants have come and as far as I know she doenst get skill breakthroughs,so legitimately no reason at all to not use her in an event like this

any of these characters would be a better choice than jiraiya.

it would allow the players to add an event only character to their collection, whilst also not taking potential for oasis to grab more money, because not a single soul in this game is spending coupons pursuing any of these anymore. Something like this would be a win/win