Of course!!! The asset itself is from the unity asset store, so for $5, you too can own diego's body lmfao.
As far as making references, I am super flattered and encourage you to go for it. I do plan on making a sequel for this game, so Diego's cannon story is not finished being told >;) But pls go for me. And let me see it when you finish! I'd love to play it and support it!!!