Lescius Dagobert

Lescius Dagobert is the Silvana's chief engineer and a member of one of the three Guild houses purged by Delphine Eraclea. Like other members of the Guild, he is interested in playing chess in his spare time and often provides counsel to Alex Row through the game. He is entrusted with the Mysterion held by his family but hands it to Alex on the eve of the assault against the Guild.

(Source: Wikipedia)