Something was off, very off.
The heroic spirits responding to the Evil Dragon's summoning just didn't seem right.
There was the beast-eared lady from the Orc Tribe, a general from the Human Race, a Barbarian Warrior who had long vanished into the river of history, a human Female Mage wearing a mage's hat, and even a Queen sitting on her throne.
The heroic spirits of the Orc Tribe would not likely acknowledge the Evil Dragon with a "Human" identity.
General-type heroic spirits typically respond only to summoners with royal blood flowing in their veins.
Heroic spirits like the Barbarian Warrior favored summoners who were brave and good at fighting.
It was normal for the Female Mage heroic spirit to respond to Lance's summoning, spirits who want to fall in love with their summoner... Seeing the human-like appearance of Evil Dragon Lance, it could be explained that she wanted to try romance with an Evil Dragon.