Professor Samuel Oak/Blake NovaThe protagonist of Arcanum Heroes and the chosen Shadow Twilight.
- Casting a Shadow: One of his elements is darkness.
- Dual Wielding: As his main weapons during non-Pokemon battles, mostly his twin swords
- Exotic Eye Designs: Blue left eye with a Psi Greek alphabet and purple right eye] with a Shadow Twilight mark
- Running Gag: Oak accidentally breaks his Twilight Baton in his Twilight form. Turns out in The Other Side of Arcanum, this was not the first time he broke it
- Shock and Awe: One of his elements, which can be No-Sell to any electricity he takes
- The Leader: Of Knights Detective Agency
Delia Ketchum/Whitney ChandlerAsh Ketchum's mother who is the deuteragonist and co-founder of Knights Detective Agency.
- Berserk Button: Try to bully her friends or hurt her son and she will burn you literally.
- Dumb Blonde: Somewhat subverted; has more of a short attention span, like in the Famous 5 TV series.
- Money Fetish: Just like the Famous 5 TV series, Dylan is always looking for the opportunity to make a quick buck, even at the most inappropriate times.
Mark UlyssesA technician-turned-World Detective who is a Twilight of Marc Clark and Jerry Lewis.
- Badass Normal: He doesn't have powers like the other adults, but can able to make or repair gadget and fight along with his B-Daman