Shadow

Hunter's spider (though Shadow disagrees in the beginning), a prideful warrior who thinks he doesn't need a rider (i.e., he distrusts and underestimates all others), especially one who may be destined to bring disaster to Arachna (i.e., Hunter). He hates large crowds. He is said to have legendary strength. He complains about most of the things Hunter does. Shadow is a direct descendant of the Ancestral Lord of Spiders. Shadow cares for Venus.

(Source: Wikipedia)