Q: That kind of suggestive line and sight, is it because you are thinking of drawing him after this?

A: Yes. To draw or not to draw. Some foreshadowing lines and such, will for sure be tied together one day. That is, closer to "coming around (the idea)", and "remembering it" than "think of it". In the beginning, I myself do not know the reason but "this is best for this", "there's nothing but this", those thoughts run my head and decide on drawing that for the character. If I do that, while drawing the following story, I'll definitely come across that scene thinking "was this thing I drew from that time for this?". That is similar to the feeling of "remembering something about a person you knew from the start" or "discovering a new side/angle of a person you just met". That's why in the TBTP arc, for example, Hisagi's "69", which is that of Muguruma 9th squad. (Muguruma's spelled with a 6-> muttsu's MU)

Q: You don't normally put "69" right?

A: Right. At first, my intention was that to make it a questionable number (laugh). It has a meaning but I thought to make it a word a kid won't ask his/her parents about, so I made it "69" (laugh). His first appearance, when Jidanbou came out, Hisagi and Izuru were behind (the wall), during that time there were no depictions that they were vice captains. After that, at the time the vice captains came together, it's the first time it became clear (laugh). If it's only from that, you won't know he's a vice captain but he was. Then, they are 3rd squad's and 9th squad's vice captains. Then, the 3rd squad's and 9th squad's captains were Aizen's subordinates. That's why the 3rd squad and the 9th squad were headed that way.