Human environmental activists

C

• Jack Coulson

F

• Emily Fletcher
• Maude Fletcher

G

• 
  Jo Grant
• 
  Charles Grover

H

• Hilda (The Green Death)

J

• Jenny (Comeback)
• Jessie (The Green Death)
• Santiago Jones' father
• Santiago Jones' mother
• 
  Clifford Jones
• 
  Sam Jones
• 
  Santiago Jones
• Josephine (The Llanfairfach Rebellion)

M

• 
  Alex Marlowe
• Ellie Martin

N

• 
  Nancy (The Green Death)

P

• 
  Margery Phipps

R

• 
  Ruth (Invasion of the Dinosaurs)

T

• Toby (Comeback)

W

• Justine Wheaton
• Robert Wilkins