Sixline wrasse sexes

[scubaSTL]

So I have had a six-line for years now. I'm assuming its a male due to its large size. I have added a tiny six-line (last week). They are not fighting, its more like the little one seems to be "trying out" for the team.
I'm wondering what's the six-lines pairing should look like? What should I watch for as a precursor to watch for to know its a female not a little fella.

 

[KJ]

https://www.reef2reef.com/threads/all-about-reef-safe-wrasses-in-aquaria.259894/

 

[scubaSTL]

great read, the female/male portion nailed it. It would seem I have a terminal male, and have added a juvenal female. The article says the female could possibly remain female for a while but ultimately will sex to male.