Some recent mentions of Mio from the other girls (Big post ahead):
Watame:
(3:22:00 for timestamp)
Not sure if it was brought up here, but one of Mio's cancelled appearances was gonna be a MUSICVERSE concert with Ayame and Fubuki. Watame was asked to take her place and she talked about that here. The sheep has been on MUSICVERSE before so they felt they could ask her to sub in. She wants to do her best not just for herself but for Mio's sake too. Watame got sick right before her 2nd Solo Live and while it wasn't as serious as Mio's case, she can relate to the feeling of getting health issues right before a major event. Mio has always taken care of Watame, so the sheep wants to show her resolve in taking care of Mio too. She hopes to welcome Mio back with a smile so that she can see Mio smile too, and asks for everyone to do the same.
Here's a more complete summary from longtime TL-er
Pentao:
Okayu:
(39:43 for timestamp)
Mio was talking about wanting curry and sashimi on twitter so chat said Okayu should give her some when she gets out. Hag cat then said Gamers and some others should do a whole celebration party for her instead. She was kinda worried though cause there's no way they can cook for Mio as well as Mio has cooked for them. She also wanted to make sure Mio has no diet restrictions when she gets out. Overall, Okayu has been feeling a bit lonely and spamming Korone's DMs since the doggo's on break and Mio responds slowly so she can't talk often.
Another summary from Pentao:
Towa:
(1:33:56 for timestamp)
Towa contacted Mio as soon as she saw the news on twitter and has been checking in on her. She's been hoping to visit Hag Wolf at the hospital but hasn't had a chance yet. She wants her to take care of herself and get better. She knows Mio must get bored being in her hospital bed all day, so she's been sending her adorable or funny videos from youtube shorts. She sent stuff like a rabbit cutely eating some food and a funny Bling Bang Bang Born MAD video, hoping to make her smile. Mio was grateful for them but it made Towa wonder if she's really laughing at them or not.
There were also some quicker mentions like Subaru earlier this week and Ayame earlier today, where they just wished her well and asked everyone to be patient so she can come back with a smile.
Lastly, this old art by Izumi-papa has been getting reposted a lot recently because it's so relevant to current times:
"May Mio-chan become both physically and mentally healthy and may her activities continue on energetically."