𝐣𝐚𝐦𝐞𝐬:
calls you beautiful.
𝐫𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠:
the reason as to why James calls you beautiful is because he wishes to remind you that you are always beautiful even when you think you are not.

𝐫𝐞𝐦𝐮𝐬:
calls you jewel.
𝐫𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠:
the reason as to why Remus calls you jewel is because to him you are always shining out from everyone and never fail to catch his attention.

𝐬𝐢𝐫𝐢𝐮𝐬:
calls you mine.
𝐫𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠:
as territorial as the name may sound, there's no true intention for it to be in that way. it's an inside joke that the two of you have though it always leaves everyone confused due to how the two of you never seem to share the inside joke.

𝐩𝐞𝐭𝐞𝐫:
calls you lady.
𝐫𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠:
the reason he calls you lady is because its something he called you before he knew your name, and since then he would call you lady once in a while even if he's been knowing your name for a while now just old habits die hard.