Jrandy is correct about everything except the long, vertical yellow edge — after glassing those sections, the edges won’t be that hard. Hans has mentioned in the past that the sharp trailing edge of a fin doesn’t need to be razor thin since fluid separation has begun before it reaches that final edge. BTW Very nice figure Jim.
All of those other corners/edges jrandy indicated with yellow and blue could make for a nasty gash if your body made hard, sudden impact with them. IMO the drag from the rounded red red face would be insignificant and the injury potential would be high. The rounded red faces would not be much different from the rounded tips of fins.
Hans post 19 regarding the long, yellow, trailing vertical edge: