Like Tengu, Flengu has wild shaggy hair that trail down to his feet, carries a leaf fan, and has tengu-geta on his feet. His hakama is colored blue, his shirt lavender-ish in hue, and his skin a dark tan in hue.
He is apparently known to cause droughts in order to punish humanity.
Flengu is exclusive to Red Cat Corps. He is a prize for the Big Boss Mission Hunt for Ultra Demuncher! as a 4 Red Cat Corps only prize. He can also be found on Patrol Missions on VIP patrol.
He is required for the Red Cat Corps Leaders Yo-kai Circle.
"Sengu" is a combination of "sengend" (scorching) and Tengu.
"Tenguflamma" is a combination of "Tengu" and "fiamma" (flame).
Origin
Flengu's fire alignment and tendency for punishing humanity might be a reference to karura, a humanoid bird creature related to the Hindu legendary birds called garuda. It generates flames that scorch the sinful, and it gives its name to the fiery halo surrounding Acala, the fierce-eyed Buddhist god that smites the wicked. Karura are a stock character in gigaku plays, and are believed to be a prototype for the depictions of tengu (see Tengu#Origin).
Trivia
Flengu's random nicknames are: Fryzzle, Fleming, Flamie, and Ginger.
In other languages
Language
Name
Meaning
Japanese
ほむら天狗 Homura Tengu
Spanish
Flamngu
Italian
Tenguflamma
German
Sengu
Combination of "sengend" (scorching) and "Tengu" (Tengu)