@odinovic If you were to delete your Pirate, then you would lose anything bought/earned in-game, such as rep but also including any limited-time stuff you may have earned (Day 1 eye-patch, Launch Crew Eye of Reach, Hungering deep scars/cosmetics etc)
Things you have redeemed by code/via the store (Ancient Coins, pets, emotes etc) I believe are bound to your Microsoft Account/Gamertag rather than your Pirate.
Before doing it be doubly sure and check with support rather than take my word as 100% true as I would hate to be responsible for you losing stuff!!
Might just be better to keep your Pirate...they can grow on you! ;)