Sim-Trip at 4

Becoming Tucker
After his "birth", Phlox became a surrogate father to him. He named him "Sim" and cared for him as Sim grew quickly to a boy, a teenager and an adult over just a few days. To the surprise (and vague unease) of the crew, as he grew older, Sim 'inherited' all of Trip's memories from that age. Archer informed him of his true existence and purpose and Sim accepted it. As the days went by, Sim became part of the crew, putting Tucker's remembered engineering skills to good use. He even saved Enterprise NX-01 from a polaric field. Sim had strong romantic feelings for T'Pol, but she seemed somewhat discomforted by his advances. Meanwhile, Phlox discovered through further testing that he was incorrect; Sim would not survive the tissue transplant.