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.
ひ
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.