Princess
Queen
suffix
The kanji and the word are exactly the same. That means they share meanings as well.
〜妃 essentially refers to the wife of a crown prince, emperor, or other royal family member. So depending on the context, it can mean princess or queen.
The reading is the same as the one you learned with the kanji.
フグは、わざとサーモン妃にぶつかりました。
Fugu bumped into Princess Salmon on purpose.