A pharmacist [Note: my speed-translation. Someone who's good at mixing stuff]. He has a flawless knowledge of how "medicines" can be mixed and there is no one out there better.
[Note: This takes a little bit of explantaion. 'Kaitou' means 'mysterious thief' or 'cat burglar' and you can kind of rework the numbers in Japanese and pronounce them as... Samantha. Oh Koyasu.]
Samantha. A master thief. He's a safe-cracking pro with technique and style.
A intelligence gatherer. Everyone calls him Miwa-chan [Note: Alternate feminine reading for the kanji in his name] and there's no information he doesn't have.
Okay! Off to the party now! Wish me luck on the speech I haven't written...! :)