na-adjective
Used for gentle, not strong, or not harsh qualities: mild taste, mild weather, mild personality, mild detergent, etc. A common loanword in everyday Japanese.
このカレーはマイルドで、子供でも食べられます。
This curry is mild, so even children can eat it.
彼はマイルドな性格で、怒った
He has a mild personality; I've never seen him angry.