He's been on his side since the earlier chapters. Bringing up, sending him back peacfully whenever he likes or if he feels unsafe. He switched sides when he realised his sweet little girl could be falling for Iruma. Cause Girl Dad is not ready to see Ameri off yet. BUT YEAH HE IS GREAT!!!
That means Ameri's dad is on Iruma side, one more aliado for when they confirm he is a human