Stahl

Stahl is a member of Chrom's Shepherds and was trained by Frederick when he was a recruit. His olive-colored hair is always messy, as if he just woke up.

Stahl has an unnamed father and brother who run an apothecary. His support with Robin reveals that he was taught the trade, and he helps make a joint birthday gift for Chrom. His brother comes up in his supports with Lissa, where she helps Stahl find a rare ingredient for his brother's stomach tonic, which comes up in his supports with Maribelle.

Stahl is first introduced in Chapter 2 during the march to Ferox. Stahl shows up midway into the march because Vaike forgot to notify him that they were leaving, leaving him upset because he had to skip most of his breakfast. Stahl formally introduces himself to Robin after hearing from Miriel that they joined the army. He participates in the battle on The Northroad and continues to help out with Chrom's army for the rest of the story.

After the war, Stahl continues his service to the Ylissean knights. His calm and scatterbrained personality makes him popular among his fellow Shepherds.

(Source: Fire Emblem Wiki)