Ouch....
The only point possible used to his advantage (though he himself doesn't know):
1. Both are related to Kirishima Industry, he is the test pilot of Armored Stratos, and Chifuyu has both professional and personal ties to the owner.
2. He greatly reminded the siblings of a long-lost father figure.
He IS the father figure in question, is amnesiac and doesn't remember anything about it.
3. He
doesn't afraid of Chifuyu, even if he always been cautious (there's a good reason his comrades called him "Armored Balls" after the Gospel incident
)