Trained on animefull, contains 2 outfits:
Default appearance: defSeth, gloves, armor, capelet, boots
More helpful prompts: armored boots, horse, horseback riding, lance, long sleeves, black capelet
"long sleeves, brown shirt" can help if he's getting short red sleeves
Silver Sea Knight FEH appearance: sumSeth, topless male, straw hat, necklace, bracelet, swim trunks, belt, sandals
Adding "injury" will give him the arm bandage/wrap. Possibly along with other injuries.
Recommend using a bit higher weight for this outfit, try around 0.8
You may be able to get a free Eirika due to her being in a lot of the training data for his default appearance.
Add "1girl, eirika \(fire emblem\)"
Adding "couple" may also help
Definitely better to add in an Eirika LoRA for serious attempts though.
Weight 0.6-0.8, I like 0.7 best