The he/she is so excited about being a hermie she's spitting nanners on the leaves. That would be enough for me to kill it and get it out but that's me. I've never seen that. Seen tiny buds on leaves but never hermie flowers. You have a unicorn plant for sure but not in a good way. You could hope for sterile pollen. Rare, but happens and when it does is very late in flower and I doubt it because that one cluster of pistils is pollinated.
From the time a pistil emerges it's sole purpose is to catch pollen. When it does, it's job is done and it dies back as the calyx begins building the seed inside. If it never gets pollinated, it stays white until it times out and develops a false calyx, aka sensimilla.
Selective pollination is very possible. A single male flower cannot pollinate every female flower in a garden and it's very possible to isolate and selectively breed flower to flower instead of plant to plant. A single hermie banana won't pollinate the whole plant but it damn sure will pollinate every pistil on the same flower. The more hermie flowers, the more pistils get pollinated