Della

Della 'the Desert Snake' McConnell is a mercenary gunslinger.

Character events sequence

 * 1) You meet Della during the quest "The First Gun Squad". This quest is unlocked after the character events of Ryoko and Elly with the Luminous Order and talking with Cassedy in the sleeping chambers about a gun squad for your country.
 * 2) Once Della is recruited as a vanguard squad leader, she will move to the Barracks. Her CG scene requires that you talk with her multiple times. The final step of the dialogs requires that her squad is at least level 7.