Seated on the left is the co-patron of the church, St. Candidus.
The Acta Sanctorum registers three martyrs by that name. One is listed without further elaboration in a group of men who were martyred at Rome during the persecutions of Diocletian (February vol. 1, 295-96). A number of early martyrologies list a second Candidus who was martyred in Rome, probably in the 4th century, but they give no other information about him (October vol. 2, 7-8). The third Candidus is listed as an officer in the Theban Legion martyred with St. Maurice, also under Diocletian (September vol. 6, 308-403). The sword in the present image could possibly allude to Diocletian's order that the Thebans be beheaded, but the absence of a palm branch or laurel crown, and the presence of a bishop's mitre, suggest that this is a fourth St. Candidus. In the crypt of the church, a 13th-century statue of the saint (right) wears a mitre and liturgical garb and has no sword.
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Read more about images of St. Corbinian.