Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the use in this Registration Statement No. 333-290426 on Form F-1 of our report dated April 4, 2025, relating to the combined carve-out financial statements of Rubico Inc. Predecessor. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ Deloitte Certified Public Accountants S.A.

Athens, Greece

October 8, 2025