Try again now. I got an error at first, and then I fiddled with the poll by adding some extra options to the last question. It worked after that, and worked even when I removed the extra options. General analysis of the robber lady and the clues about who she is.
The clues we have so far about the female criminal are that she holds the gun in her right hand, and she moved recently (I wish I knew how recently). Conan didn't know about the move so the answer should be clear regardless, and the robber has some reason not to answer the phone call from Kei. Kei had all three women in his phone book so I suppose he has connections to all of them somehow. Two of the three residences had trash day. The robbers likely left most of the money in the locker, so they shouldn't be very rich yet except for what they grabbed and pocketed like Kei did. It would be hard to use the money on big transactions because of the serial number issue. Considering the Kei was friends with the dead bank employee then he might be aware of this and have informed the other two not to spend it without laundering it first. The robbers can't count on Kogoro finding the locker quickly either, and although Kei suggested the female robber run, running doesn't make sense until she has the cash on hand and knows Kei won't trick her. Kei also wasn't packed up yet which means Kei still hasn't acted on his own advice.
I think all three of the women are single.
Analysis of the first lady, Toyokita Rinko
The first lady seems right handed for sure because of the way the coffee-cup, fork, butter(?) knife, napkin, and spatula are placed. Door opening doesn't count because Gosho tends to draw characters so they open the door using the hand on the same side as the hinges regardless of handedness. She is also cranky and was not keen on Conan entering the apartment.
Toyokita claims to work at a convenience store on the late shift, and she claims she is normally sleeping at the visit time, yet she is awake for some reason. Furthermore, she has been awake for a while: she is already dressed and that omelet and toast were ready to eat (she started on the toast). Depending on complexity, omelet making times range from 20-50 minutes for pre-prep and cooking in my experience.
"So I'm usually sleeping at this hour." I can't tell what Toyokita's annoyed answer at the door actually meant; was she claiming to be asleep and that Conan woke her up, or was she just bad-tempered because she was up early and told Conan her schedule for future reference because she doesn't want to be disturbed? If she was claiming to be asleep and Conan woke her up, she is blatantly lying and might have hid something before answering the door. Why she wouldn't answer the phone though is a mystery, unless she was cooking and didn't hear it, or she discovered Kei was dead.
If she wasn't claiming to be asleep, is hard to gauge if or why she is lying about her schedule because she didn't offer a reason why she was awake and prepared. If she is lying, maybe she does something at that time, or wants cover for leaving at strange hours. If she is telling the truth about her schedule, and she woke up a while ago because of something, maybe it was from the phone ringing? If she thought it was something related to Kei it might make sense for her to get moving because it could have to do with the money from the locker, although it doesn't explain why she wouldn't return the call unless she discovered Kei was dead.
Analysis of the second lady, Furiya Sakae
The second lady is of ambiguous handedness although she may be right handed based on her unlocking the door. She made it abundantly clear she has recently come into money and the timing for that seems to be fairly recent. The trash day is the day after tomorrow for Furiya, but she is moving out tomorrow so she was dumping hers a day early. She is remarkably free with this information. If she was the robber, Furiya might come up with an excuse that she won the lottery to explain all the high end stuff in contrast to the low end apartment and trash, but she wouldn't have needed to tell the two she was moving apartments.
Her bag was completely full of convenience store box meals which is pretty low-end stuff (although more expensive than cooking yourself). The box store meals imply that before her "lottery", she likely was not all that wealthy and/or extremely busy so boxed meals were more convenient. The trash was completely full, implying she had been in the apartment for at least a short while (like a week), assuming she lives alone. Considering the robber was supposed to have just moved into her current apartment, she shouldn't have accumulated that much meal trash yet.
Furiya moving out would seem to imply that she is running like Kei suggested, but this would be strange because she doesn't have the robbery money yet. Also, moving into an apartment unit then out of it quickly would be rather unusual and might raise red flags with the landlord because normally there are contracts that would need to be broken, and usually you pay upfront for the first month at least. She would be using up a lot of money to move apartments twice in a row and buy expensive clothes on top of it. It would be hard to pocket that much money from the robbery. Kei had ~ 97,000 yen on him + whatever is in his apartment. That amount still wouldn't be enough to switch apartments quickly unless one had savings to tap.
I assume she was out shopping and didn't hear or answer the phone.
Analysis of the third lady, Tegawa Takayo
The third lady's apartment looks lived in because it has more stuff. The lady looks to be left handed considering the side the pens and light are on (to avoid writing in your hand's shadow). The trash bag was full of one type of meal, which is presumably Tegawa's particular favorite, so cost probably isn't a consideration here. The trash bag is also full which implies that, like the second lady, there is at least a few days worth of meals implying Tegawa has been in the apartment for at least a short while, assuming she lives alone. She probably didn't answer her phone because she is busy. The writing deadline, assuming she is telling the truth, would not work out so well with a party, but without knowing what kind of writer she is, flexibility is hard to evaluate.
Robber identity hypothesis
I think the first lady is most likely the robber because her handedness matched and her attitude against intruders was noticeable. Also, the other two women had trash to take out, but she did not. Although trash day isn't always at the same time throughout a city and I am unfamiliar with Japanese custom regarding trash day times, no trash or trash cans are visible in the kitchen. If she just moved into an apartment and thus had not accumulated much trash yet, or had thrown out some robber paraphernalia, this makes sense. Also there is the issue about what she meant by saying she usually is asleep.
The second lady is less likely to be the robber than the first because of the time issue with the trash accumulated, moving out before having the cash in hand would be strange, the logistics and risk of spending money on stuff, and how open she was about her finances and future plans.
Considering the left handedness, the state of the apartment, and the trash, I think the third lady is the least likely to be the robber.
Urakawa Serina probably plans to commit suicide when this is all over. She never used the sleeping pills on Kei, so I assume she they are for her.