Who is Abelard Malcolm Tyler Lindsay from Schismatrix Plus and what is their importance?

Lindsay is from the Mare Serenitatis Circumlunar Corporate Republic and travels to the Mare Tranquillitatis People's Circumlunar Zaibatsu seeking political asylum. Lindsay is indicted after the fall of the Shapers to the Mechanists. He is disgraced and seen as an embarrassment, but this action only strengthens his resolve. In combination with Constantine, they form a team that is formidable, but Vera Kelland comes between them with a suicide pact.