 If you liked
Erementar Gerad
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C³
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In both shows there is a fighting male protagonist and a female companion who can change into his weapon [Yachi and Konoha=Coud and Ren].
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Recommended by Daisetsu-bushido
In both anime, faith/coincidence leads to the meeting of male and female protagonist.
Female character changes into weapon and fight along side MC.
Both anime focuses on bond shared between male and female characters to overcome enemies.
Both anime have harem like setting.