I kinda follow her since the beginning of Twitch and it was clear for me that she never will do any "explicit" content because she's a prude person.
And she streamed once doing a Yoimiya cosplay wearing a top and there was a see-through to both nipples. It's nothing much, just a random contribution, but here are some screenshots, the brighter version is the original and the darker version is the "enhanced" version (only changed the brightness/contrast):