By using push-pull substitutions on TPHA, we have recently demonstrated that diradical character can be enhanced and ferromagnetic ground-state can be obtained. There has been plentiful of research works, both experimental and theoretical, devoted to the various synthetic strategies and guidelines on the design of high-spin diradical moieties incorporating stable spin-sources. In contrast, only a handful of reports are there on the thermally stable triradicals. Triradicals with three unpaired electrons give rise to quartet as ground-state when all the three localized spins are ferromagnetically coupled to each other. If two of the unpaired electrons are antiferromagnetically coupled, it results in doublet as ground-state. Recently, Mishra et al. have reported on-surface synthesis of a non-benzenoid triradical with quartet ground-state. Tretyakov and co-workers have reported a verdazyl-nitronyl nitroxide triradical with quartet ground state. The triradical trications based on thianthrene featuring a doublet ground state have been synthesized by Tang et al. A propeller shaped triradical has been recently reported by by Kodama et al. with doublet ground state. So far, only two works on triradicals featuring Blatter's radical have been reported. First one is a star shaped symmetrical triradical possessing Blatter's radical synthesized by Zissimou et al. with computationally determined doublet-quartet (∆E D,Q ) energy gap of 0.109 kcal/mol (38.1 cm -1 ) using BS-DFT (UB3LYP/6-31G (2d,p)) method. The quartet ground-state is recently confirmed by CW and pulse EPR spectroscopy. Second work is a triradical obtained by coupling Blatter's radical with the two nitronyl nitroxide radical by Rajca et al. It is reported to possess two doublet-quartet energy gaps, ∆E D1,Q ≈ 0.2-0.3 kcal/mol (69.9-104.9 cm -1 ) and ∆E D2,Q ≈ 1.2-1.8 kcal/mol (419.7-629.6 cm -1 ). DFT method which is known to provide better results as compared to BS-DFT. In addition to the DFT methods, we also utilized SA-CASSCF/NEVPT2 multi-reference methods to compute the doublet-quartet energy gaps using different active spaces. By making a blueprint of our computational scheme used for the Rajca's triradical system and by utilizing the basic structural framework of the highly stable Blatter's radical, we have designed three additional Blatter's based triradicals. The two triradicals, denoted as Bl-Bl-NN(B), Bl-Bl-NN(C) in Figure , are obtained by coupling di-Blatter diradical (Figure ) with the nitronyl nitroxide radical through ring B and ring C of Blatter's radical. The third one is exclusively based on Blatter's radical, i.e., tri-Blatter triradical, denoted as Bl-Bl-Bl (Figure ). The design principle for these triradicals is combination of already existing diradicals as shown in Figure , thereby making the proposed systems realistic with a possibility to be synthesized and studied in near future.