About
One of two selves created when Diego Vargas passed through a natural Nexus during ISV Resolute lifeboat evacuation Day 110, 2200. Mateo (shaved-head self) and Reyes (hair-kept self) both served as navigation officers aboard ISV Resolute II from 2204-2220. Mateo killed Day 65 during Junction 44-F engagement against Hostile; his nav calculations completed 3 seconds before death enabled Resolute II to evade next attack.
Family
As Diego Vargas (pre-fragmentation): Father: Javier Mateo Vargas (b. ~2145, Bogotá) Mother: María Reyes (b. ~2148, maiden name; Bogotá) Post-fragmentation: Mateo maintains contact with Diego's family; they address him as "Mateo" from 2200 onward.
Off the page
Maintains shaved head (from Day 127, 2200) Takes night shifts (divergence pattern from Reyes who takes day shifts) Sketching hobby developed Book 4 (Diego never sketched) Writes to Diego's family weekly Shares meals with Reyes (brotherly routine maintained 20 years)