Exhibit 5.15

CONSENT OF CID GONÇALVES MONTEIRO FILHO

The undersigned hereby consents to the reference to his name, where used or incorporated by reference in the Registration Statement on Form F-10 of Ero Copper Corp., including in the Annual Information Form filed as an exhibit thereto, being filed with the United States Securities and Exchange Commission, and any amendments thereto.

Yours truly, 

/s/ Cid Gonçalves Monteiro Filho

Cid Gonçalves Monteiro Filho

SME RM (04317974), MAIG (No. 8444),

FAusIMM (No. 329148)

Dated: August 29, 2025