Anthony Lester, whose real name is Anthony Carter, leads the SPK's operations as its number two. He started out commanding a special forces unit, but these days he's basically Near's right hand—handling the practical stuff that comes up and assisting with whatever Near needs, from urgent matters to booking flights.
Near trusts Lester completely, which is rare for him. In fact, Near shares his thoughts and plans with Lester in ways he doesn't with anyone else on the team. What makes Lester invaluable isn't raw genius—he can't match Near's analytical abilities, even though he's no slouch himself. Instead, it's his reliability. He's honest to a fault, athletic, and quiet in a way that makes him genuinely useful. The official guide describes him as Near's guardian figure, and he's also the only SPK member Near is confident has never been spotted by Kira.
People call him "Commander Lester" pretty regularly. After the main series wraps up, he sticks with Near, continuing to work alongside the new L and Halle Lidner.
Content compiled by AnimeList.moe from publicly available sources.