The base and stand pole of the figurine shown in the attached photo. Only for the figure in focus (Rei with black plugsuit on white octagon base. I don't know what exact model serial she is, but she's from a gachapon set. I don't know what the original base looks like. I just design so she can stand without bending and deform her ankles.

Base is printed in 5 pieces 1 base with 3 holes 2 foot pins 1 pole 1 brace

Print each part with the flat face down. Every part can be printed horizontally without support. Do not print pins and pole upright. The layer bond strength is not enough for their task, and pins might snap inside her feet otherwise.

Put each pin into foot holes. Make sure the rectangle of the bases sit together and form a long rectangle. This will keep the pins together and not roll around. Put the pole from under the base. The stop pin will keep it stuck in the base. Then put the brace on Rei Q first, and attach her to the pole with the brace. Push her legs into foot pins after that. Following this steps will ensure the brace doesn't keep rubbing her hip and body which may scratch her.