I'm pretty sure that the 'blonde' they're referring to is Cleveland.
In Asia, dyeing your hair blonde or other stranger color usually means you're a delinquent, party people, chad. So in the NTR trope it's usually a dyed-hair dude that steals the normie protagonist's girl. And that kind of person is now simply referred as "blonde". ....Well yes, in this specific comic it's referring Cleveland.
Sucks for Cleve, cant even get a dance with her gf
Stay away, blond
"Blond" is referring to Cleveland.
No worries, we are fully prepared!Extremely IntenseゴゴゴゴゴゴゴゴゴゴゴゴゴゴPro...protect?We will protect you!But where are yours?Um, thank you for helping me prepare my clothes...Good! Look here!Nice, change your pose!
Start Building!Episode 65: The Thwarted Love MK.II