Tango is two years old and remains the youngest in the Bachelor band.
The bachelor Diego is four years old. In the RR HMA, four is usually the age a stallion secures a mare.
Nicholas is four this year also. He’s been the leader of the bachelors for almost a year. Based on his personality, he will probably secure a mare before Diego.
Bachelor number four is Mama’s three year old Fairbanks. Based on his personality, I believe he’ll naturally move into the bachelor band leader position when Nicholas leaves the band.