姑
=
古
+
女
:
Gitta Giraffe (gu) and Bessie Coleman (女) have both decided to become nuns (姑). In front of the space station (Ø1) they are about to enter a secluded cloister (古).
姥
=
女
+
老
:
Sir Lancelot (l) and his mother Bessie Coleman (女) meet Lancelot's granddad (老) in the aorta (ao3). His granddad says that he cannot keep his secret anymore: actually he's a woman, so he's his maternal grandma (姥). She also wants to become governess (姥) of the aorta.