| Term |
Age |
History |
|---|
| 1 |
12 |
Entered Military Academy(Dolphin Military Academy) |
| 1 |
13 |
Dropped out of military academy. |
| 2 |
13 |
Became a Agent (Law Enforcement) with the new title Rookie. |
| 2 |
15 |
Go undercover to investigate an enemy. |
| 2 |
15 |
A police detective or rival criminal forces Columbus Harper to flee and vows to hunt Columbus Harper down. Gain an Enemy. |
| 3 |
17 |
Continued as Agent (Law Enforcement). |
| 3 |
19 |
An investigation takes on a dangerous turn. |
| 4 |
21 |
Continued as Agent (Law Enforcement). |
| 4 |
24 |
Given specialist training in vehicles. |