Eiki is a woman who refuses to accept any nonsense during working hours, but will allow a select few to tie her as a means of unwinding once she's off for the day. There's really no good way to take her by force at all since she, as a yama, is one of the most powerful women from the Gensokyo area (yes, even Yukari is afraid of her). When does deign to be tied, there's no secret in the fact that her legs are both her best feature and her overall weak spots. Her usual outfit emphasizes them nicely, but a swimsuit or leotard works even better since she has very wonderful curves above her legs. Enjoy them with a personal touch since it's a waste to use Foam on them. Pack her mouth and give her a heavy gag just in case she decides to start a lecture during the captivity.