Titles, that you can use for your character.

Title	How to unlock
Adventurer	Completed 100 missions
Analyzer	Analyzed 3-star weapon in the laboratory
Analyzer Initate	Performed analysis in the laboratory for the first time
Apprentice	Completed 1 mission
Battle Machine	Defeated 100 enemies
Battle Master	Defeated 300 enemies
Berserker	Defeated 750 enemies
Craftsperson	Exchanged weapon at the workshop for the first time
Decimator	Defeated 5000 enemies
Devastator	Defeated 1500 enemies
Divine Touch	Revived allies 500 times
Expert Remover	Removed 10 obstacles
Explorer	Completed 10 missions
Fortune-Favored	Analyzed 4-star weapon in the laboratory
Gold Collector	Total of 9.999.990 Treasure Points earned
Handyman	Upgraded a tool at the workshop
High Roller	Used 500 medals
Jackpot	Defeated 25 rare enemies
Life Safer	Revived allies 100 times
Lucky Star	Defeated 5 rare enemies
Master Remover	Removed 50 obstacles
Millionaire	Used 100 medals
Miracle Worker	Defeated 100 rare enemies
Multi-Millionaire	Used 1000 medals
Newcomer	Reached level 5
Paramedic	Revived allies 25 times
Platinum Collector	Total of 99.999.990 Treasure Points earned
Reaver	Completed the tutorial
Remover Apprentice	Removed 5 obstacles
Reviver	Revived allies 5 times
Rookie	Booted the game for the first time
Russian Roulette	Used 10.000 medals
Silver Collector	Total of 999.990 Treasure Points earned
Top Notch Scavenger	Reached level 10
Treasure Hunter	Completed 1000 missions
Uber-Remover	Removed 100 obstacles
Veteran Collector	Reached level 50
Weapon Collector	Upgraded a weapon at the workshop