The eldest child will grow to be a matured, calm, dutiful, responsible person. She will have more self-control and would think of others before herself. She can pamper others naturally.
The youngest child will be rather moody, difficult, demanding and sometimes act like a baby.
The myth continues that the perfect couple would be a union of an eldest child (after growing up, of course) with the youngest child. They could balance each other and create a fine chemistry as husband and wife. I think sometimes Michi look like such couple, and no question about who the baby is. Prachi can understand his tantrums and he appreciates her pampering him.
The only thing is that Milind was the eldest child himself😆
Krishna just in case you're reading and wondering yes this thread is inspired by your post in CJID thread:)