Banana has an unhealthy obsession for her husbando Mei-kun from Danpri.
She wants to be more than her fellow "shallow" fans.
Get the idea from legal loli that buying shares from Cauliflower, the company that handle Mei-kun and his IP could also be considered as a way to support his husbando.
Becomes convinced by herself that it would put her above all the other fans.
She wants to buy Cauliflower shares but discover that they are only sold in bundle of 1000 that she can't afford.
So she buys Kani (ToT) shares instead, who are the company hired by Cauliflower in charge of making the new gacha because she's convinced that the new gacha will be a success and that both Kani and Cauliflower will moon as a consequence.
Her plan is to use that "knowledge" and sell Kani once it's high enough to buy Cauliflower instead because she doesn't care about Kani, only Cauliflower since they are the true owner of the Danpri IP.
Personality-wise, she's basically the gif below but with husbando instead of waifu: