I present you a moment in time between Keriss and Tauga.
Giant monster runs past followed by other Demi-gods going to fight it. Excitedly Keriss goes to find her armoured suit to join battle but finds it missing.
"Tauga!" "What?" "Where is my armoured suit?" "Whaat?" "Where. Is. My. Armoured. Suit?!" "I, uh, put it away." "Where?!" "Why do you need to know?" "I need it!" "Oh no, don't you think about doing running off to do no dare do. We've planned this training for two months" "The public is in danger!" "My evening's in danger!" "Tell me where my suit is, woman! We're talking about the greater good!" "Greater good? I am your only friend! I am the greatest good you are ever gonna get!"
Funnily enough I was planning to do have him be new, or at least newer. Maybe been around since the battle of Cadia or something, basically pleading to be healed because of a wound which may have been lethal or something. Unfortunately, we must remember that one must put their loyalty to the Death Guard, not join them just side with them. So on and so forth