Rebel Yell

Progression:

! Rank || Title || Armor || Adrenaline
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 * 1 || Agent || +5 || +30%
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 * 2 || Covert Agent || +6 || +40%
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 * 3 || Stealth Agent || +6 || +45%
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 * 4 || Mysterious Agent || +7 || +55%
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 * 5 || Shadow Agent || +7 || +60%
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 * 6 || Underground Agent || +8 || +70%
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 * 7 || Special Agent || +8 || +75%
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 * 8 || Valued Agent || +9 || +85%
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 * 9 || Superior Agent || +9 || +90%
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 * 10 || Secret Agent || +10 || +100%
 * }

Trivia

 * The picture is likely of Captain Langmar.
 * This may be a reference to the song "Rebel Yell" sung by Billy Idol.