Shika Kagura was sipping on some tea.
More accurately speaking, she was sipping on some tea while watching Seiji's stream.
Although she was unable to go together with him due to her "Reaper's Curse," this method was fine as well.
She also established a voice chat with Seiji over the internet on his chatting application, but didn't say much. Basically, she only asked him to buy a few things that she was interested in.
Some requests were too difficult for her to say out loud, so she didn't tell him even though she wanted them. For example… the hentai doujinshi of I Can't Sleep When I'm Sleeping Together with My Younger Sister.
Out of all the people that she saw together with her Brother Seiji, only the one called "Lavender" was someone she had never met before. It seemed that Lavender was simply an ordinary girl.