“Listen: I'm here by my king's order, and by his order alone. I'm well aware that we have diverse backgrounds and experiences. I don't care who I pair up with. You can't always have your own way. That's just how it works in Frelia.”
Gilliam is a playable character in Fire Emblem: The Sacred Stones. He is a quiet, yet dependable, armored knight of Frelia. He joins with Franz to rescue Princess Tana in Chapter 1, and later is appointed by King Hayden to be Eirika's escort along with the priest Moulder and the pegasus knight Vanessa. He is a long-time friend of Moulder and Vanessa's older sister, Syrene.
In his support conversations with Garcia, the two arm wrestle against each other to see which one of them is the strongest. Gilliam loses to Garcia in their first match, but in their second support conversation, Garcia notices that Gilliam fights with his lance in his left hand. They have a second match, this time with their left arms, and Gilliam is victorious, making them evenly matched in strength.