A Starfleet lieutenant working with Harry Kim at headquarters in an alternate timeline, who grows suspicious of his friend's sudden strange conduct.
Lieutenant Lasca is an engineer at Starfleet Headquarters. He appears in the second-season Voyager episode Non Sequitur.
In the reality where Harry Kim stayed on Earth, Lasca is his partner on the design of a new runabout and is with him at the presentation to Admiral Strickler. He is baffled when Kim seems not to recognise their own project.
When Kim starts using other people's access codes to dig into Voyager's files, Lasca concludes that something is badly wrong and joins the security effort to hold him. Kim nevertheless gets away with Tom Paris's help and flies a runabout back into the time stream.